Getting a Tuya TS0001 relay to be in "inching" or auto-off mode

I’ve got a MHCOZY SMT145 dry-contact Zigbee relay. ZHA is detecting it as a Tuya TS0001. What I’d like to do is configure it as an “inching” or auto-off relay (to trigger my garage door opener).

The problem is that, in the page to configure it, the cluster attributes are rather vague.
In TuyaZBOnOffAttributeCluster, I’ve noticed, among others, attributes “off_wait_time”, “on_time” and “switch_mode” which look a little promising.

After a bit of hunting, I found some threads which suggest that “off_wait_time” is the main attribute I’m after, and it is to be set to an integer representing seconds, but setting that to something like 3 didn’t cause it to auto-off. Another thread suggested that “on_time” also needs to be set to the same value. I tried that, too, and it didn’t help.

Does anybody have any clarification on what these attributes control and how I should configure them for auto-off?

UPDATE: I found an actual explanation of the parameters here on page 3-53. “on_time” seems to be how long to wait before switching back off provided that the device receives an “on with timed off” command (can ZHA even be configured to send that?). “off_wait_time” seems to be a timeout to guard against a flood of “on” commands. So… neither of those are what I’m after, it seems.

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