Breadcrumbs do not appear in structured data testing

I added the code below in funtions.php section, the breadcrumbs do appear on the site and in the AMP version of the site but when I check it on the Google structured data testing tool it does not show up in the desktop version however the AMP version does show it. What can I do to fix this?

`add_filter( ‘the_content’, function( $content ) {
if( function_exists( ‘rank_math_get_breadcrumbs’ ) ) {
$content = rank_math_get_breadcrumbs() . $content;
}
return $content;
});

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