No specific guides for that. If you have any concrete questions i'd be happy to help. Generally:
1) Update hardware configuration accordingly
2) Ensure that TouchGFX is driven by events from this new display. If this display is the same display interface you could get some inspiration from your existing project. If MIPI DSI do you want to run in adapted command mode or video mode? etc.
3) Update TouchGFX GUI according to new dimensions
/Martin
