Yes, I can confirm, after uninstalling Kaspersky, the powershell.exe started in wsl2 path used 3557ms, compared to 3021ms started in windows path.
before uninstalling Kaspersky, with `system watcher`, the whole system hangs entirely longer than 5min (I have to cold reboot it in the end) - all UI is frozen, the taskmgr.exe is not responding, etc. Without `system watcher`, I remembered that the startup time of powershell.exe is around 3000-4000ms.
I have logged a request with Kaspersky Customer Service. If there is any update, I will also put it here.