The Zooz Zen16 multi-relay has 3 switch inputs that you could use to sense the output of the Dakota receiver.
I have a Dakota driveway alarm. The receiver has 3 "dry contact" outputs. I have two of the outputs wired to the switch inputs on a Zen16. One is for the magnetic sensor in the driveway and the other is for a pushbutton that acts as a remote doorbell. I've set up automations so that I get a Pushover notification when either of the Dakota sensors is triggered. It's been reliable.
I know you don't need the relay outputs on the Zen16. You'll end up needing two Zen16's to connect all 6 of your Dakota sensors, so not inexpensive.
Good luck with your project.
