Someone on the German T-Cross Forum has found a web site containing a workshop manual for the T-Cross, see link below:-
https://cardiagn.com/vw-t-cross-c11-2019-2020-workshop-manuals-wiring-diagrams/
https://cardiagn.com/vw-t-cross-c11-2019-2020-workshop-manuals-wiring-diagrams/