Custom post type static titles.

functions.php

<?php>

/**
 * Static page header title on case-study post types
 */

add_filter( 'astra_advanced_header_title', 'page_header_case_study_title' );
function page_header_case_study_title( $title ) {
	// Add your condition where you want to update the Page Header title.
	if ( is_singular( array( 'case-study' ) ) ) {
		$title = "Case Study";
	}
	return $title;
};

/**
 * Second static page header title on member post types
 */

add_filter( 'astra_advanced_header_title', 'page_header_member_title' );
function page_header_member_title( $title ) {
	// Add your condition where you want to update the Page Header title.
	if ( is_singular( array( 'member' ) ) ) {
		$title = "The Elite100 Directory";
	}
	return $title;
};