Local songs greyed out for region lock on iphone.

iPhone XS on 14.6

I dropped a playlist into my iphone using a non-iTunes software called Copytrans or something, and several songs are greyed out for "it is not available in your region". Which does not make sense at all given the songs come from my pc.

It also doesn't look like it is the case that the software has issues because it is only like 10 out of 300 having issues.

What is the problem here and how to solve?