I needed to import a gallery in Power Apps, in which the field that will serve as the basis for the search is a multiple selection from a Sharepoint list. How is it possible to do this?

I needed to import a gallery in Power Apps, in which the field that will serve as the basis for the search is a multiple selection from a Sharepoint list. How is it possible to do this?
Google is your friend here.
Here is one example by @RezaDorrani that does just this
https://www.youtube.com/watch?v=Wr42PeW6_wU