Here's a tutorial for the following snippets showing you how to customize Yoast Breadcrumbs https://carriedils.com/modify-yoast-breadcrumb-text-for-parent-and-child-pages/

functions-step1.php

<?php
/**
 * Filter breadcrumbs on Salary Data pages.
 *
 * @param array $link The link array.
 * @param array $breadcrumb The breadcrumb item array.
 *
 * @return str  $link The link output.
 */
function zg_add_text_to_breadcrumb( $link, $breadcrumb ) {

	// Do stuff here.

	return $link;
}
add_filter( 'wpseo_breadcrumb_single_link', 'zg_add_text_to_breadcrumb', 10, 2 );

functions-step2.php

<?php
/**
 * Filter breadcrumbs on Salary Data pages.
 *
 * @param array $link The link array.
 * @param array $breadcrumb The breadcrumb item array.
 *
 * @return str  $link The link output.
 */
function zg_add_text_to_breadcrumb( $link, $breadcrumb ) {

	// Only run this on salary pages.
	if ( is_singular( 'salary_data' ) ) {

		// If we are on the parent page AND targeting the correct breadcrumb in the array.
		if ( ! has_post_parent() && ( get_the_title() === $breadcrumb['text'] ) ) {

			// We're on a child page.
		} else {

			// Modify parent breadcrumb.
 			global $post;
			$parent_title = get_the_title( $post->post_parent );

			if ( ( $parent_title === $breadcrumb['text'] ) && ( strpos( $link, 'breadcrumb_last' ) === false ) ) {

			}

			// Add text to final breadcrumb.
			if ( strpos( $link, 'breadcrumb_last' ) !== false ) {


			}
		}

		return $link;
	}
}
add_filter( 'wpseo_breadcrumb_single_link', 'zg_add_text_to_breadcrumb', 10, 2 );

functions-step3.php

<?php
/**
 * Filter breadcrumbs on Salary Data pages.
 *
 * Format should be:
 * Home / Salary Data / [Job] Salary / Salary data for a [Job] in [Location]
 *
 * @param array $link The link array.
 * @param array $breadcrumb The breadcrumb item array.
 *
 * @return str  $link The link output.
 */
function zg_add_text_to_breadcrumb( $link, $breadcrumb ) {

	// Only run this on salary data pages.
	if ( is_singular( 'salary_data' ) ) {

		// If we are on the parent page AND targeting the correct breadcrumb in the array.
		if ( ! has_post_parent() && ( get_the_title() === $breadcrumb['text'] ) ) {

				$link_text = get_the_title() . ' Salary';
				$link      = sprintf( '<span><a href="%1$s">%2$s</a></span>', $breadcrumb['url'], $link_text );
			// We're on a child page.
		} else {

			// Modify parent breadcrumb.
			global $post;
			$parent_title = get_the_title( $post->post_parent );

			if ( ( $parent_title === $breadcrumb['text'] ) && ( strpos( $link, 'breadcrumb_last' ) === false ) ) {
				$link_text = $parent_title . ' Salary';
				$link      = sprintf( '<span><a href="%1$s">%2$s</a></span>', $breadcrumb['url'], $link_text );
			}

			// Add text to final breadcrumb.
			if ( strpos( $link, 'breadcrumb_last' ) !== false ) {

				$title = get_the_title();

				// Decide which article to use.
				$a_or_an   = in_array( strtolower( $title[0] ), array( 'a', 'e', 'i', 'o', 'u' ) ) ? 'an ' : 'a ';
				$link_text = 'Salary data for ' . $a_or_an . get_the_title();
				$link      = sprintf( '<span class="breadcrumb_last">%1$s</span>', $link_text );
			}
		}

		return $link;
	}
}
add_filter( 'wpseo_breadcrumb_single_link', 'zg_add_text_to_breadcrumb', 10, 2 );