I was looking into this further because it’s sort of impacting my dual-boot workflow. I have ext4 media drives on Linux that aren’t viewable or readable from Windows, but Linux can at least read the NTFS drive. The third parties I’ve tried in the past for making Ext4 readable in Windows File Explorer have some sketchy security concerns and/or missing Win10 support.

It looks like using the method described in the link below it’s now possible to mount ext4 drives via WSL2 and even browse them in File Explorer:

https://superuser.com/a/1630438

It’s not clear if they are also writable or not, I’m off to try it!