Rock PI4c MIPI DSI not working

Hi,
I’m using this panel:
https://osoyoo.com/2019/11/12/instruction-for-raspberry-pi-7-dsi-touch-screen
All images

  • rockpi4c-android10-20200727_1032_ff35b7a-rkupdate.img
  • rockpi4c_ubuntu_focal_minimal_arm64_20200820_1207-gpt.img
  • rockpi4c_debian_stretch_desktop_arm64_20200716_0647-gpt.img

does not work with the Raspberry PI Touchscreen. The OSOYOO panel works fine if connected to Raspberry PI 3B+.
Any solutions?