Is this a black owned shop with some visible black workers?

No

They have Asian, Hispanic, and black workers

Not sure but don't think so based on seeing interactions. Mixed staffing Asian and black.

I came for a fill. They told me that I had to completely replace 2 nails that were not broken or missing, just lifting. Never heard of this in my life.

It is not black own and yes there is black work but they are the best

So that's a no

This is one of the best nailshop in the country.