There is a setting called “Follow Request/Approve” which says “When ON, you are notified when someone requests to follow you or when someone approves your request to follow them”. I have this setting disabled. I am still notified every single time somebody approves my follow request.
Additionally, I think this setting should be two settings rather than one.
Edit: it occurs to me after writing this that it’s specific to the Zwift Companion app. Does that still apply to this forum?