Homey's complete refusal to acknowledge Apple devices

I guess the problem is, that either Notifications nor Localization enabled on the iPhone and the iPad, because these options are not visible.
And there are already “complaints” about it in the forum and on Slack:

The reason why there are not more complaints is that the problem doesn’t usually occur when the Homey smartphone app is updated, but does occur when the app is reinstalled. At least that’s my personal experience.