Two other considerations have been mentioned in other threads on ID.4s and trailer hitches on this forum:
1) The thickness of the receiver walls and the length of your hitch pin (the wall thickness on the ID.4 is greater than most 1 1/4 receivers). Make sure your hitch pin is long enough.
2) The distance from the ID.4 receiver to clear the rear bumper may be longer than expected - VW recommends NOT going longer than 7", but I found with this: Curt Class II Euro Style Drawbar with 2" Ball - 2-5/8" Rise - 3,500 lbs Curt Trailer Hitch Ball Mount C45572 (etrailer.com)
that the length: 7-1/4" from center of hitch pin hole to center of ball is just barely long enough to easily hitch up our utility trailer with a 2" ball.
I know that this is a different application than what you are looking for, however, the dimensions will still be something for you to verify before expecting everything to fit and work as you'd like.