Look at the date
entropicdrift
I mean, personally I do all of my gaming on Linux and fully removed Windows from my gaming desktop in 2022 and haven't looked back. My VR headset is a Vive, so it works just fine with SteamVR on Linux, no additional issues there, even while using Proton.
I was just thinking exFAT would work more consistently for a steam library under Linux than NTFS and it would also not introduce any issues on Windows.
You would need to reinstall your games on Linux, to answer your question. Steam and Heroic Games Launcher make this process quite painless, but yeah, still gotta do it. NTFS supports ignoring upper/lowercase, whereas Linux (and other Unix-y systems) do not, at least by default. This can cause all kinds of weird issues down the line.
Now that said, one thing you could do is make a new steam library on Windows to a drive or partition formatted as ExFAT, then use Steam on Windows to transfer your games to that new library. If you did that, I think you could simply add that steam library to your instance of steam running on Linux Mint. Combined with setting steam to use Proton for any Windows game (it's just one checkbox to do so), I think maybe you'd be in business.
Skill issue