So I am glad to say I got the Remotec working as a wall switch and connected to my hub. I also got it connected to my Logitech Harmony Hub remote and can now turn on my fireplace while watching TV.
And for safety, I would never automate a fireplace to heat my place up. I know some people do and may need to, but not needed for me.
The 120V surge fried my thermocoupler and thermopile, plus installation fee… an expensive lesson
Anyway now, I notice that every now and then I see the switch’s blue LED blink a few times and then stop. It does not stay on, it just blinks and then goes dark after those few blinks. It also appears to be working fine 3 days into installation. I checked the manual section, “LED Indication Status”, and there is no mention of this behavior. All of the operations talk about flashing and then the light staying on. I also don’t see anything showing up in the Recently tab of the SmartThings classic app. I will check the IDE logs to see if anything, but figured I’d ask here first, if anyone had a similar experience.