You can share a keyboard and mouse across multiple Windows and macOS computers, if you know the right tools to use.
Logitech’s MX Master is one of the best-known mice in the business, and the last iteration – the MX Master 3S – has long been ...
You can use two Windows machines at once with a single keyboard and mouse without any special hardware. I had an extra laptop lying around that now connects with the same keyboard and mouse as my PC.