I have an Xbox since my Playstation is broken. Can I simply connect my Ps4 controller there by cable or do I need something in addition. (Since I play the back keys on the Ps4 controller, I can't switch to an Xbox controller)
I think if you connect the PS 4 controller to the Xbox, Bill Gates will come and vaccinate you.
Ok haha
The CronusMAX universal adapter is what you are looking for:
https://www.amazon.de/...B00T76ZGDY
Unfortunately, I can't tell you how reliably this works from a lack of experience, but you can bypass the controller lock without running the risk of losing any guarantees.