Missed the background info that WSL 1 was a pico process, based on Drawbridge research, and not the same as previous subsystems.
"The Linux Kernel Hidden Inside Windows 10"
https://youtu.be/_p3RtkwstNk?si=V9vhvrdDOLu2Durr
WSL Pico Process Overview
https://learn.microsoft.com/de-de/archive/blogs/wsl/pico-pro...
The same Drawbridge technology is used to run SQL Server on Linux.
https://arstechnica.com/information-technology/2016/12/how-a...