What also work is the app cloning on Android phones.
If you have an Android phone than you can use the feature: Dual Apps / Parallel Apps / Clone Apps etc…, each manufacturer have differnet name for this feature.
On my Xiaomi phone it is called Dual Apps, and you can go to settings and search Dual Apps then select MyPhonak , it creates a copy of the app (twin instance) with a slight different symbol on the start screen. The cloned app have the yellow clone symbol.
Each instance is connected with a different pair of hearing aids.
The left App is connected with Naida L90 , the right App is linked with Naida M90