I'm using Roots Bedrock + Sage 9 Beta 3. I've created a custom post of type lp that I want to set as my homepage. Here is the code I'm using:

function cptui_register_my_cpts_lp() {

    /**
     * Post Type: Landing Pages.
     */

    $labels = array(
        "name"          = __( 'Landing Pages', 'sage' ),
        "singular_name" = __( 'Landing Page', 'sage' ),
    );

    $args = array(
        "label"               = __( 'Landing Pages', 'sage' ),
        "labels"              = $labels,
        "description"         = "Pages without menus and/or totally custom layouts.",
        "public"              = true,
        "publicly_queryable"  = true,
        "show_ui"             = true,
        "show_in_rest"        = false,
        "rest_base"           = "",
        "has_archive"         = false,
        "show_in_menu"        = true,
        "exclude_from_search" = true,
        "capability_type"     = "post",
        "map_meta_cap"        = true,
        "hierarchical"        = false,
        "rewrite"             = [ "slug" = "lp", "with_front" = true ],
        "query_var"           = true,
        "menu_icon"           = "dashicons-welcome-widgets-menus",
        "supports"            = [ "title", "thumbnail", "excerpt" ],
    );

    register_post_type( "lp", $args );

}

add_action( 'init', 'cptui_register_my_cpts_lp' );

I've installed mpress-custom-front-page but it doesn't seem to see my landing page.

So, with some digging, I noticed that it uses get_posts() to get posts with post_type = 'any'.

The query it sends is so:

$queried_post = get_posts([
  'posts_per_page' = - 1,
  'orderby'        = 'title',
  'order'          = 'ASC',
  'post_type'      = 'any',
  'post_status'    = 'publish',
]);

This query returns all of the posts except my custom post types:

If I redo this exact query, but set post_type to 'lp' then I get my post, no problem:

Why would any not find my custom post type?