The hot corner doesn’t work in Ubuntu 22.04 and Fedora 36. Just like disabled.
Hot corner requires pressure to get triggered but by default, VM managers only track cursor position and a few gestures. So, the guest OS does not know if you tried to apply pressure to a corner and hot corner never gets triggered.
Some VM managers like Virtualbox have an option to give exclusive cursor access to the guest OS. In other words, they have an option to capture mouse (or other) cursor. It solves the stated problem. Check Hyper-V documentation. It should also have a similar option.
Thanks, I’ll give it a try.