Yes Tips of fingers can grow back in some people after cutting off the fingertip.
Most commonly kids who cut the tip of their finger will sometimes have their fingertips eventually grow back as they grow and get older.
Not everyone's fingertips will grow back though after amputation or after injury that cut the fingertip off but it is possible for some peoples fingertips to grow back to almost normal.
Your fingerprints will not usually be the same though but your fingertip may grow back.
But sometimes they don't grow back and you may still have a deformity of the fingertip.