$ uname -a Linux MYPC 6.6.87.2-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Thu Jun 5 18:30:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

Dunno, looks pretty Linux to me.

(WSL1 did suck badly because it combined the limitations of NT - slow file ops and process spawn - with the limitations of a compatibility layer. WSL2 is good enough for compatibility testing work on e.g. dotnet)