Thank you so much @missveronicatv ! ??
I only had to make a small change, otherwise it threw a syntax error:
add_filter( ‘um_user_display_name_filter’, ‘my_um_user_display_name_filter’, 10, 3 );
function my_um_user_display_name_filter( $name, $user_id, $attrs ) {
//if( um_profile_id() == $user_id && $attrs == 1 ) {
$name = um_user( ‘company_name’ ) . ‘ | ‘ . um_user( ‘first_name’ ) . ‘ ‘ . um_user( ‘last_name’ );
//}
return $name;
}