Notifications / geocoding not working on iOS companion app

I recently tried to purge all the various extraneous sensors and integrations that I had acquired through following the iOS companion app through its many beta versions until it was released on the app store. I thought it would work to delete everything, remove the apps and begin again with it.

Whilst I now have the iOS app working on both mine and my wife’s phones, notifications are not working anymore for either, and neither are geocoded locations.

Anyone have any tips as to how to get these working again? I’ve tried all sorts, too many methods to list really, so what is the approved method for restoring these features, please?

Thank you!