Hi A,
Apologies for the delayed reply.
Please put this in your bp-custom.php

add_filter( 'mpp_user_can_create_gallery', 'mpp_custom_prevent_gallery_creation', 11, 3 );

function mpp_custom_prevent_gallery_creation( $can_do, $component, $component_id ) {
	
	return buddydev_is_above_subscriber();
}

add_filter( 'mpp_user_can_upload', 'mpp_custom_prevent_gallery_upload', 11, 4 );

function mpp_custom_prevent_gallery_upload( $can_do, $component, $component_id, $gallery ) {
	
	return buddydev_is_above_subscriber();
}

That will do it but the Ui will be still visible.

Hi A . Rhein,
I am sorry, That was a mistake in my part.

I forgot to put the function we are calling.
Please add this snippet too to your bp-custom.php

function buddydev_is_above_subscriber() {
	
	if (  current_user_can( 'delete_posts' ) ) {
		return true;
	}
	
	return false;
}

Now, that will work for sure.