It is highly recommended to use a screen protector on your phone, but you must invest in a premium one. In particular, make sure to look for one that is fully compatible with the fingerprint scanner. You can find these on Amazon; they might be expens...

I use an S25 Ultra. The issue with adding a screen protector is that it often makes the fingerprint scanner slow or completely unresponsive. It's best to ask about this before making a purchase. I've already had to replace my screen protector twice.