I bought an OpenGarage for my brother maybe 5 years ago (“Black Friday” sale every year). He gave it back to me when he got a new opener. I updated the firmware , installed it on an old opener at our dad’s house and it works great. You might need the “Security 2.0” accessory, or they have instructions for soldering wires into an existing button:

https://openthings.freshdesk.com/support/solutions/articles/...