For macs, if you're signed into the same Apple account on both, you can "share" the same keyboard and mouse across them.

It does tend to be finicky - sometimes it just refuses to connect, and won't tell me why, and sometimes it'll forget the arrangement. And it requires you to be signed into one account on two machines, which some people may not want to do on corporate laptops.

Unfortunately, finicky isn’t acceptable when it comes to keyboard and mouse.

Yes and then sometimes your mouse is gone (just to be found on some iPad display) :-/