And this is why I will never spend a cent on any of those fancy high-end ebikes. They are loaded with proprietary software and hardware that make repairs difficult or downright impossible.
My daily workhorse ebike is from 2013 and uses generic parts all over. Even the battery has been re-celled and the internals replaced with generic parts.
If your bike requires an app to function then there is no other way to say this - you just got scammed.