No one monitors the WP forum, this is the correct place to ask questions.
Not that I know how to help you. Do other shortcodes work in FSE templates?
In ACF you must provide the $post_id value of where to get the value from if you are not showing values for the current post or if you are showing values outside of “The Loop”. My guess is that if other shortcodes work then the ACF sortcode is not working because ACF does not know where to get the value from.
