Hi, another observation I made during the last week.
While both Wiresock VPN and original WG clients have this issue in WinPE, TunSafe client works out of the box. The only think that is required is install TAP adapter before using it.
tapinstall.exe install OemVista.inf tap0901
Of cource TAP adapter can be also injected into WinPE (with DSIM or similar) , and then is no need to install it in the script. So for the time being, I stick to TS.