I used a Keyboard mapper and it says I dont have a license

Hallo, so I bought MC in 2019 for my new device. Since I cant use a keyboard and mouse in 1.16.220, I found a keyboard mapper which allows me to use a keyboard and mouse in ANY game. I opened MC and it said there was a licence error which clearly I bought it. Hope this can be fixed soon and when are the keyboard and mouse support going to be avaliable? Thanks.