how easy is it to unlock a garage door without an opener/key?
Yes that tab is replaceable. You need a good lock shop. If they don't have the exact piece they could make one. Also if you know who made the lock, go to their website to check for parts or distributors that would have the part. It is fairly standard. But be sure the square shaft on the end where this tab goes on isn't damaged. Good luck.
sounds good to me lmao jk jk