I just connected my garage door opener to Home Assistant by taking apart a paired remote and wiring the button to a Zigbee relay. They can't stop me, no part of this is connected to their cloud. In any case, smart home stuff should never rely on the cloud.
https://i.imgur.com/lNOXdhe.jpg
If you have a Chamberlain garage door opener and looking to connect it to HA you can do this too.