Enable Breadcrumbs in Rankmath

enable-breadcrumbs-in-rankmath.php

<?php
// I'm not sure which version, but Rankmath started requiring opt-in for themes.
// I think that's stupid. So I wrote this.
// Place as an mu-plugin or include via Code Snippets: https://wordpress.org/plugins/code-snippets/
add_action( 'after_setup_theme', function() {
	add_theme_support( 'rank-math-breadcrumbs' );
} );