FACETS : Add "Apply" button that will apply all filters in one query Is it possible in D8 to add an "Apply" button that will apply all facet filters in one query and not having an ajax reload on each option changed ?

i find this for D7 :

https://www.drupal.org/project/ajax_facets/issues/2700063

i am not quite sure  what's been the issue of that issue.
i have created an issue on the facet module and the situation is :

Not soon in the drupal 8 version. This would be a big refactor of the way queries are built right now.

https://www.drupal.org/project/facets/issues/3013702