I saw a video of the Al Smith Dinner. Biden did not have anything on his wrist let alone his rosary Beads. I don’t know how to link things but look for yourself.
Good catch. Probably he got punched by staff for blowing it debate night. There was a picture on this thread a few weeks ago of the back of Biden's hand at some function and there was a small round dark bruise in the middle. The immediate suggestion here was evidence of an IV puncture.
There is little doubt in my mind that Biden and his team cheated in the debate. The method is a mystery for now.