Turning off sensors

When I first connected my mobile app to my home assistant, it had 2 entities. I turned on some more in the “configure sensors” or whatever in the app, and now I have those as well. However, if I turn off some sensors, that never syncs to home assistant. It forever sees those sensors as well. It stays that way unless I uninstall the app, delete the integration, and start over. I have to make sure not to turn on any sensors accidentally because there’s no way to remove them other than to start again.

Am I missing something?