That’s the issue: HomeKit devices cannot be paired to more than one controller (hence the “no unpaired devices could be found” error). So you have to remove them from the Home app on iOS, possibly reset them (device-dependent), then add them to HA.
That’s the issue: HomeKit devices cannot be paired to more than one controller (hence the “no unpaired devices could be found” error). So you have to remove them from the Home app on iOS, possibly reset them (device-dependent), then add them to HA.