After finally looking into it I managed to “automate” the creation of Wallpaper Engine’s project.
So I built all the wallpapers of War Thunder (that aren’t single still images) and made them into working Wallpaper engine compatible stuff
They are all available on the steam workshop here
I must warn that those wallpapers are “made” for a 16:9 screen at 1920x1080, it might break very badly for other ratios and even other resolutions, for that you’re on your own
I hope that this will help the couple peoples that asked me about LWP no longer working (LWP either do not support Win 11 or doesn’t have what I need to make it works currently)