How to add Schema markup to breadcrumbs

I've used the code from this answer in the breadcrumbs, and it works well. I also added Schema.org markup: https://schema.org/BreadcrumbList Please see at the bottom under Microdata, It asks to add this line:

meta itemprop=position content=1 /

under each menu item. I can add it to the home page like this:

ul
lia href=?php echo home_url(); ?/projectsProjects/ameta itemprop=position content=1 //li
?php
    $term = get_term_by(slug, get_query_var(term), get_query_var(taxonomy) );

    $tmpTerm = $term;
    $tmpCrumbs = array();
    while ($tmpTerm-parent  0){
        $tmpTerm = get_term($tmpTerm-parent, get_query_var(taxonomy));
        $crumb = 'lia href=' . get_term_link($tmpTerm, get_query_var('taxonomy')) . '' . $tmpTerm-name . '/a/li';
        array_push($tmpCrumbs, $crumb);
    }
    echo implode('', array_reverse($tmpCrumbs));
    echo 'lia href=' . get_term_link($tmpTerm, get_query_var('taxonomy')) . '' . $term-name . '/a/li';
?

but I can't use it for the other pages, because sometimes there is one more breadcrumb, and sometimes there are 2, 3 or 4 additional breadcrumbs.

And if I am adding: under the second breadcrumb, and under the last breadcrumb in the code, like this:

ul
lia href=?php echo home_url(); ?/projectsProjects/ameta itemprop=position content=1 //li
?php
    $term = get_term_by(slug, get_query_var(term), get_query_var(taxonomy) );

    $tmpTerm = $term;
    $tmpCrumbs = array();
    while ($tmpTerm-parent  0){
        $tmpTerm = get_term($tmpTerm-parent, get_query_var(taxonomy));
        $crumb = 'lia href=' . get_term_link($tmpTerm, get_query_var('taxonomy')) . '' . $tmpTerm-name . '/ameta itemprop=position content=2 //li';
        array_push($tmpCrumbs, $crumb);
    }
    echo implode('', array_reverse($tmpCrumbs));
    echo 'lia href=' . get_term_link($tmpTerm, get_query_var('taxonomy')) . '' . $term-name . '/ameta itemprop=position content=3 //li';
?

Then it is not displaying correctly on most pages,

Please see the site to understand exactly:

This page has 1 additional breadcrumb:

https://fast-food-near-me.com/location/az/

(Not correct, showing breadcrumb 1 and 3)

This page has 2 additional breadcrumbs:

https://fast-food-near-me.com/location/phoenix/

(Correct, showing breadcrumb 1, 2 and 3)

And this page has 3 additional breadcrumbs:

https://fast-food-near-me.com/location/85003/

(Not correct, showing breadcrumb 1, 2, 2 and 3)

(Additional to the home page, which shows correctly on all pages since it doesn't need a special function)

Until now, I wasn't using the position markup, but I noticed Google Search Console displays an error: missing position.

Your explanation would be very appreciated, thank you very much!