Yeah, that "Unsupported Device..." note caught my eye too.
And I'm now 99.9% certain that the OP has that MHCOZY, not a Z17...
In this post of OP's original thread, JasonJoel mentions that he uses a Z17, but he posted an Amazon link to a MHCOZY -- I'm sure his intentions were simply to link a zigbee version of a relay that was otherwise very similar to OP's tuya wifi relay.
I never actually clicked JasonJoel's link until just now, so yeah, I'd bet anything that's the story here.
