Current menu item in screen reader in WordPress

Use one of the following snippet in child-theme/functions.php

add_filter( 'nav_menu_link_attributes', 'dy_menu_atts_filter', 10, 3 );
function dy_menu_atts_filter( $atts, $item, $args ) {
    if( in_array( 'current-menu-item', $item->classes ) ) {
		$atts['aria-current'] = 'You are standing on the current element.';
		
    }
    return $atts;
}

or try this

add_filter( 'nav_menu_link_attributes', 'dy_menu_atts_filter', 10, 3 );
function dy_menu_atts_filter( $atts, $item, $args ) {
    if( in_array( 'current-menu-item', $item->classes ) ) {
		$atts['aria-current'] = 'true'; //aria_current
		
    }
    return $atts;
}