Since this is a UI forwarder to a Windows machine, I don't think so?

Well, WSL GUI apps are just a forwarder to a Linux VM in the Hyper-V hypervisor.

WSL2 is. The first WSL wasn't though, was it?

https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux

> allows the use of a Linux environment from within Windows, foregoing the overhead of a virtual machine and being an alternative to dual booting.

WSL2 isn't a Windows subsystem by definition as far as I can tell.