MS non-profit grant ending--understanding check

We have a bunch of Microsoft 365 Business Premium licenses assigned to our users. I know that the free grant is ending, but I don't see any way to see which of our (50ish) users have 'free' licenses assigned.

My understanding is that when the grant program ends next month (for us), our paid for license count will simply increase by 10 users--is that correct?

I know this is a time old complaint, but why does MS licensing have to be so hard?