Edit Dec-'24: I made a much more robust solution for this here.
https://www.printables.com/model/1097842-dewalt-sander-planer-to-wetdryvac-to-dwv9000-quick
Rotating dust collection adapter for a battery powered DeWalt DCW200 (will likely work with the wired one as well)
I modified a previously available model by adding a stoper to prevent it from sliding past the swivel point.
The author remixed this model.
Added a stopper to prevent the adapter from sliding past the rotation point when in use with DCW200