Using the Post Grid Combo plugin, you can enable a filterable grid with multi-filter. This article will show you how to enable filterable grid with multi-filter.
Insert a “Post Grid — Filterable” block first.
Click on the “Filterable” tab.
Add some filter groups by clicking on “Add Filter Group.”
Now, expand the filter group and add the filter group name and some filters by searching for them on “Search Terms.”
From the “Enable Multifilter,” make it “True. “
Using this method, you can enable multi-filter.