Another Touch ID question and best way to glue or tape it back on

This iPad had a cracked LCD I purchased an assembly and switched it out move the original home button very carefully but like so many others forgot to disconnect the battery. Now the home button works and after an update it no longer gives me an error that it cannot be activated but there is no touch sensing. So when I first put the iPad back together I got the error unable to activate touch ID but now the error doesn’t come up it lets me go to add a fingerprint but it doesn’t detect my finger at all when I touch the button and I cleaned it I read that possibly disconnecting the battery and reconnecting it might help but I doubt that’s what it is. Also I want to be sure the button doesn’t fall through and need advice on the best way to adhere it back on and the bracket I am assuming the bracket will hold the button in and the gasket is just there for sealing it. I thought about putting a drop of glue on that bracket to make sure it doesn’t come back off maybe some 3m 52.00. Seems like most of the tape I bought is OK but not super strong like the original