yep. the RatGDO project will handily MITM their wired signal and completely circumvent this nonsense with no cloud needed at all.
https://openthings.freshdesk.com/support/solutions/articles/...
The device has been fantastic, I got mine about 4 years ago and I just never think about it, it's never failed to work (even after power outages).
Mine isn't a motion sensor, it's a distance measuring device, it's how it can tell if a car is in the bay or the garage door itself is open (you set the distances in the device)
The ratgdo device is decoding the line version of the Security+ 2.0 protocol, which gives you state information/etc. They have a page describing what they currently decode:
https://paulwieland.github.io/ratgdo/01_features.html
FWIW The Flipper Zero can decode the wireless version of the Security+ 2.0 protocol.