Update WSL (to use "store version" features) without the Microsoft Store:
- Download the latest WSL app package release: https://github.com/microsoft/WSL/releases
wsl --shutdown
Add-AppxPackage Microsoft.WSL_1.2.5.0_x64_ARM64.msixbundle
Optionally, reboot before and/or after installing the package if features aren't working properly (not required for --mount, maybe required for WSLg)
Attach bare vhdx disk (useful for formatting to ext4)