i want to leave the insider hub , but i deleted the app from xbox , And i cannot download...

You can leave the beta by going to the xbox insider app and press on leave in the minecraft hub.

Hi

If you have previously been in the program all you need to do is download the Xbox Preview Dashboard/Xbox Insider Hub app and then re enrol your console in the program.

I cannot I recently upgraded from the 360 and I needed to be invited in order to get the preview dashboard app

My console doesn't appear there but states it's in the program. I didn't use my account to add it. Is that why?

Thats Correct. The account that enrolled your console into the program would need to login to remove that console from the program.

Go into the Insider Hub app and side scroll to the settings section, then Manage Devices, and de-authorize the console from the program. Keep in mind, this will remove you from the program and also remove all Insider updates. As such, your console can
auto default back to its original settings which is the same thing as doing a complete factory reset. You will need to re-install your account and all digital content onto the console once you boot it back up. When I left, it took a few days before the console
reverted itself back to factory defaults. Good luck!

My console doesn't appear there but states it's in the program. I didn't use my account to add it. Is that why?

Go into the Insider Hub app and side scroll to the settings section, then Manage Devices, and de-authorize the console from the program. Keep in mind, this will remove you from the program and also remove all Insider updates. As such, your console can
auto default back to its original settings which is the same thing as doing a complete factory reset. You will need to re-install your account and all digital content onto the console once you boot it back up. When I left, it took a few days before the console
reverted itself back to factory defaults. Good luck!