The problem with the peel-off sticker approach is whether or not it's reversible in the eyes of the law. I live in a a part of my state where Class 3 Ebikes are technically illegal (but most local bike shops sell them), and only Class 1 & 2 Ebikes are legal anywhere on the state trail system. My states laws are a mess: Class 3 Ebikes can only be ridden in cities with a population of one million or more and NO Ebike (Class 1, 2 or 3) can be ridden on any street with a speed limit of 30 MPH or more (but analog bikes can), go figure. So technically I can't legally ride my Mini off the edge of my property, have to load it in/on the car and take it to a trail or street with a 25 MPH MMax speed limit. It's quite discouraging at times.
Another thing that confuses me is that some Rad Mission owners appear to be reporting that the speed override thing works on that model, which wasn't even released until after it was disabled on our Minis, sometime around mid 2020.
Fortunately enforcement on technicalities has been lax in the part of the state where I live, but it will only take one crusading Dudley Do-Right to completely ruin a trip someday.