I think all the existing answers are on the basis of creating a new Linux VM.

And if I understand you correctly, you already have a bare metal Linux install that you want to run whilst Windows is up.

This is the best search result I could find: https://forums.virtualbox.org/viewtopic.php?t=93437

It sounds like Virtualbox will indeed create a pseudo vhdx that points to a real partition, but windows is going to give you permissions drama.

The above link is out of date though, so its best viewed as info rather than guide.

Good luck.

A lockdown browser?

If you need to use windows because of a software issue, not a hardware issue, you’re probably best off running windows in a VM.
That way your linux install is making the WPA3 connection, and as far as the Windows install is concerned, it’s on a wired lan.
This has the added benefit of not having to reboot, you just always start linux and turn the windows VM on and off as required.