I've come to the conclusion that ubreakifix has no standard policies on what they will repair, at least none that are enforced.
When I made a reservation online, within minutes a guy called me to ask what I needed repaired (the only info I could give was I had a Z Fold 3 so I think he was suspicious of the screen protector). When I said what I needed, he told me, "yeah we don't do those here," but then told me 2 other local ubreakifix did. Even when I stopped in, the first person who was helping me tried but then came back out and said the old protector was really stuck and he needed to wait until his manager returned to let him do the repair.
Once the manager returned, he took all of 5 minutes and like new again. I can tell the difference too in screen feel. Brand new protectors have an incredibly smooth feel.