Snippet to remove default product tabs and add custom tabs on WooCommerce product page

replace-default-product-tabs.php

<?php

add_filter( 'woocommerce_product_tabs', 'remove_product_tabs', 20 );
function remove_product_tabs( $tabs ) {
    unset( $tabs['description'] );      	// Remove the description tab
    unset( $tabs['reviews'] ); 			// Remove the reviews tab
    unset( $tabs['additional_information'] );  	// Remove the additional information tab

    return $tabs;
}

/**
 * ADDS CUSTOM PRODUCT TABS
 */
  
add_filter( 'woocommerce_product_tabs', 'custom_product_tabs' );
function custom_product_tabs( $tabs ) {
	$tabs['custom_tab'] = array(
		'title' 	=> __( 'Custom Tab', 'woocommerce' ),
		'priority' 	=> 40,
		'callback' 	=> 'custom_tab_content'
	);

	// ONLY ADD TAB IF IT HAS VALUE IN BACKEND
	if ( get_field('custom_tab') ) :
	$tabs['custom_tab'] = array(
		'title' 	=> __( 'Custom Tab', 'woocommerce' ),
		'priority' 	=> 40,
		'callback' 	=> 'custom_tab_content'
	);
	endif;

	return $tabs;
}

// The new tabs content
function custom_tab_content() {
	echo get_field('custom_tab');
}

?>