Comment meross has a serverless solution (Score 2) 125
this thing:
https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB084...
comes with the option of just buying another literal remote button for your door. newer doors have "encrypted" remote buttons, so you can't just wire in a new contact button like the one on the wall, so, you "wire in" a new, encrypted remote button. the button sits there inside the garage, and is a functional remote button, but is hard wired to the meross homekit device. when you use your phone, the device sends the "press me" signal to the remote, and the remote sends the encrypted signal to the opener.
works like a charm, available now, no hassle.