My screen is a 7” DSI (this model) and I had new hope after reading the linked thread. Even though the connection type is different, their issue about touch scaling described in the first post is exactly my problem.
My screen works flawlessly in Bookworm OS but in Zynthian I’ve not been able to overcome the issue despite repeated tinkering with config files.
I think in another screen problem thread Riban said to raise an issue but that it can be hard for devs to test without hardware in hand.