It is called "Ground Assist". You use a small screen menu and can control a tow (in a rough way but with a lot of fun...).
This in use, it is so much more realistic to move the Harriers at RAF Gütersloh or the Harrier Hides which will come in the package as well.
Basically, the prog comes with a default tug, but with some few improvements, you can use all models out of scenery libraries.
The tugs are only static models without any animations but are movable via the screen menu. Once connected to the aircraft, you can push, pull and steer the aircraft. Mainly, I use the former RAF Unimog Tug from RAF Gütersloh for ETUO and the Hides:
Push Back request:

Push Back attached:



But other models are easily to add:
RAF green tug

RAF yellow tug (used for personal use from the Leuchars scenery)

US Chevy tug (used for personal use from Stevo from the twin bases)

Limitations: There has to be build some more tows with different pole lengths because the correct position of the tugs depends on the contact points of the aircraft. A-10s or F-4 Phantoms need other poles then the Harrier. It might be possible by using tugs with three different pole lengths and tow couplings...
For all who are interested in:
https://skyware.ca/products