The gloves don't even go home with the fighters either, they are approved by the sanctioning bodies and then they keep them before and after the fight as far as I'm aware. This is what Wilder fans are like though, because they don't know what they are talking about, they self destruct with their own arguments, time and time again.
We also have the fact that Wilder is claiming Fury didn't hurt him, his legs were just gone before he got in the ring because of the costume weight, is the excuse they've gone with.
If they wanted to make a conspiracy, it should have been the wraps, which the fighters do get to keep. However both teams overlooked the wraps being done on their opponent before the fight. If the wraps have been overlooked, you can be pretty sure it's a bullshit claim these days(unless it's called out before the fight, instead of an excuse after), after Margarito got caught out. As was the stacking Canelo claim IMO because they were stood watching(needle marks too, bullshit claim by sore losers), plus most are unaware, it's not even against Nevada rules anyway because the advantage it gives is nothing like plaster wraps. Lots of fighters have done it but it's easy to spot and it's down to your own team to call it out at the end of the day, if you think it's that much of an advantage(I suppose it would have to be in the contract for Vegas fights). That's the one job the guy watching the wraps has. Stacking is less to do with the thickness of the wraps, than it is to do with layering gauze ontop of the surgical tape.