I forget the type of mic but there are mics specifically designed for picking up vibrations from surfaces (I googled it, they're called surface mics ffs, could probably use a cheap normal mic without a pop filter tho)
If those use USB or 3.5mm, or can be made to, then plug them in and on windows check the "listen to this device" checkbox and boom, you'll hear what's coming through that mic. Adjust the sensitivity to your needs, done
On other OSs you can do it too just as easily but I don't remember what my Linux distro calls it and if you've installed Linux you have enough info from my comment to figure it out methinks
Proton is a better option unless the game needs Anti-Cheat, which most won't work in a VM, anyway
Personally I dual boot Win10 LTSC with fake credentials and some privacy tweaks for games that need to be on windows