Advanced? filtering

I’m not sure if I just dont understand the documentation or if there simply isn’t a solution for this. I’m trying to do the following:

I have a custom post type “House” and a custom post type “Appartment”. The relation :

p2p_register_connection_type( array(
        'name' => 'appartment_to_house',
        'from' => 'appartment',
        'to' => 'house',...

The appartment have an ACF (Advanced Custom field) called “rooms”.

I would like to list all houses that have appartments with the value of the ACF field “rooms” beeing “2”.

I can list all the houses, and all the related appartments like described here but how can I narrow them down as described above?

https://ww.wp.xz.cn/plugins/posts-to-posts/