So I bought a Logitech G29, which I can use on the PC and PS4 without any problems. Now I'm wondering if the G920 (which only works on the X-box and PC) can also be connected to the existing pedals on my G29 steering wheel. Because this way you could save yourself some money if you now buy the steering wheel individually.
In my opinion, the G29 pedals are already compatible with the G920 steering wheel, since the primary difference between the steering wheels is only compatibility (Playstation and Xbox) and appearance. So I'm pretty sure it works. If, despite my answer, you are still unsure, please contact Logitech Support (https://www.logitech.com/de-de/about/contact.html)
