Had the same experience when getting my non-iPhone repaired. They said they need it to verify the new screen works properly. I said, I will not give them my PIN

Had the same experience when getting my non-iPhone repaired. They said they need it to verify the new screen works properly. I said, I will not give them my PIN. That apparently removed some warranty that it's working? It's very very weird, but it's probably just to test each area of the screen (can't be done when locked). I just tested it in the store myself.