With our Peugeot Rifter, the tailgate can NOT be opened with the bicycle carrier attached and tilted. Especially with large tailgates (such as the VW T6) I would not assume that it works. However, the trailer coupling may also play a role.

Yes, the tailgate can be opened because the bicycles can be put in the back. There is a simple rocker function that can be operated with the foot (grey step under the Thule label). After closing the tailgate, the bicycles can be put back in the vertical position.