Cannot manage to display my CPT in Recent Posts widget

I tried a few solutions from the web, but none of them seem to work.

// #1
add_filter( 'widget_posts_args', 'th_widget_recent_post_cpt' );
function th_widget_recent_post_cpt($args, $instance) {
    $args['post_type'] = array( 'post', 'events', 'products');
    return $args;
}


// #2
add_filter('widget_posts_args', function( $params ) {
    $params['post_type'] = array('post', 'events', 'products');
    return $params;
});


// #3
function th_recent_posts_args($args) {
    $args['post_type'] = array('post', 'events', 'products');
    return $args;
}
add_filter( 'widget_posts_args', 'th_recent_posts_args');


// #4    
function th_recent_posts_args($args, $instance) {
    $args['post_type'] = array( 'post', 'events', 'products');
    return $args;
}
add_filter('widget_posts_args', 'th_recent_posts_args', 1, 2); 

I guess I am missing something basic.

I registered the CPT using the following code:

function th_custom_post_type_1_event() {

    // Set UI labels for Custom Post Type
    $labels1 = array(          // https://developer.wordpress.org/reference/functions/get_post_type_labels/
        'name'                = _x( 'Events', 'Post Type General Name', 'zakra' ),
        'singular_name'       = _x( 'Event', 'Post Type Singular Name', 'zakra' ),
        'menu_name'           = __( 'Events', 'zakra' ),
        'parent_item_colon'   = __( 'Parent Event', 'zakra' ),
        'all_items'           = __( 'All Events', 'zakra' ),
        'view_item'           = __( 'View Event', 'zakra' ),
        'add_new_item'        = __( 'Add New Event', 'zakra' ),
        'add_new'             = __( 'Add New', 'zakra' ),
        'edit_item'           = __( 'Edit Event', 'zakra' ),
        'update_item'         = __( 'Update Event', 'zakra' ),
        'search_items'        = __( 'Search Event', 'zakra' ),
        'not_found'           = __( 'Not Found', 'zakra' ),
        'not_found_in_trash'  = __( 'Not found in Trash', 'zakra' ),
    );
     
    // Set other options for Custom Post Type
    $args1 = array(            // https://developer.wordpress.org/reference/functions/register_post_type/
        'label'               = __( 'events', 'zakra' ),
        'description'         = __( 'My Events', 'zakra' ),
        'labels'              = $labels1,
        'supports'            = array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'revisions', 'custom-fields'),
        'hierarchical'        = false,
        'public'              = true,
        'show_ui'             = true,
        'show_in_menu'        = true,
        'show_in_nav_menus'   = true,
        'show_in_admin_bar'   = true,
        'can_export'          = true,
        'has_archive'         = true,
        'exclude_from_search' = false,
        'publicly_queryable'  = true,
        'capability_type'     = 'post',
        'rewrite' = array('slug' = 'events'),
        'show_in_rest' = true, 
    );
     
    register_post_type( 'events', $args1 );  
}

 
function th_custom_post_type_2_product() {

    // Set UI labels for Custom Post Type
    $labels2 = array(          // https://developer.wordpress.org/reference/functions/get_post_type_labels/
        'name'                = _x( 'Products', 'Post Type General Name', 'zakra' ),
        'singular_name'       = _x( 'Product', 'Post Type Singular Name', 'zakra' ),
        'menu_name'           = __( 'Products', 'zakra' ),
        'parent_item_colon'   = __( 'Parent Product', 'zakra' ),
        'all_items'           = __( 'All Products', 'zakra' ),
        'view_item'           = __( 'View Product', 'zakra' ),
        'add_new_item'        = __( 'Add New Product', 'zakra' ),
        'add_new'             = __( 'Add New', 'zakra' ),
        'edit_item'           = __( 'Edit Product', 'zakra' ),
        'update_item'         = __( 'Update Product', 'zakra' ),
        'search_items'        = __( 'Search Product', 'zakra' ),
        'not_found'           = __( 'Not Found', 'zakra' ),
        'not_found_in_trash'  = __( 'Not found in Trash', 'zakra' ),
    );

    // Set other options for Custom Post Type
    $args2 = array(            // https://developer.wordpress.org/reference/functions/register_post_type/
        'label'               = __( 'products', 'zakra' ),
        'description'         = __( 'My Products', 'zakra' ),
        'labels'              = $labels2,
        'supports'            = array( 'title', 'editor', 'excerpt', 'author', 'thumbnail', 'revisions', 'custom-fields'),
        'hierarchical'        = false,
        'public'              = true,
        'show_ui'             = true,
        'show_in_menu'        = true,
        'show_in_nav_menus'   = true,
        'show_in_admin_bar'   = true,
        'can_export'          = true,
        'has_archive'         = true,
        'exclude_from_search' = false,
        'publicly_queryable'  = true,
        'capability_type'     = 'post',
        'rewrite' = array('slug' = 'products'),
        'show_in_rest' = true, 
    );
     

    register_post_type( 'products', $args2 );  
}
 
 
 
add_action( 'init', 'th_custom_post_type_1_event', 0 ); 
add_action( 'init', 'th_custom_post_type_2_product', 0 ); 

What could be my error?

Do I need to use 'events', 'products' or 'event', 'product' ? none seems to work...

I registere the CPT in one plugin file. and try to add the filter in another file ( which can be activated\deactivated withot deleting my posts). is this a problem?

[same problem in old wp version - https://wordpress.stackexchange.com/questions/154143/unable-to-show-recent-custom-post-types-in-default-recent-posts-widget]