My daughter was quick off the mark and made a lot of designer masks whilst on lockdown. She worked day and night trying to keep up with orders. As everyone and their dog got on the bandwagon, she eased off and put her energy into something else. My wife has two hearing aids and she too had the mask removal problem. After putting our heads together it was a fairly simple solution..
Make a close fitting plyable mask in any fabric.
Make the loops from the standard elastic material.
Close to where the loop meets the mask, cut the elastic and fit a snap connector. The type you would find on a lanyard.
Now she just unclips the mask and lifts it over the hearing aid on one side. This leaves the mask loose and easy to lift over the other hearing aid.
Initialy she fitted two clips, one on each loop. But it seems that just one clip solves the problem.