I’m trying to look on some easy controllers that are wired and only has the up down left right A B menu and reset. Something I could attach to a computer
You should be able to connect game controllers (game pads, joysticks, etc.) to your computer and use those. I’ve used a variety of controllers on both Linux and on Windows, and they’ve worked fine for me.
You’ll need as many controllers as players. So, if you want three players to play a game, you’ll need three controllers. I don’t think there is a way for MakeCode Arcade to support, say, two players at the keyboard and then a third with a game controller.
Maybe give these a try?