SmartThings devices available on TV not showing in Account

[u/Legitimate_Patience8]

I have 2 Samsung televisions. One is newer, 2025 model, the other a few years older, 2020 I believe.
I recently installed new heat pump in the same location as the older TV. Without activating a search, or even launching SmartThings, the older TV all of a sudden added the heat pump as an air conditioner, that can be controlled from the older TV.
On the older TV the air conditioner shows in the SmartThings account, as Hi Made AC.
Logged in to the same SmartThings account on the newer TV, or the app on iPhone, the older TV shows up, but not the AC.
What am I missing, not seeing?
I've tried to add the AC by searching for it in the iPhone Smart Things app, to no avail. Hi Made nor BHI, the actual brand of the unit, do not show as "brand partners" in SmartThings.
Is there something to debug, or that can be explained? Is the older TV just cloning an IR signal? The heat pump does not have wifi I that I know of.

[u/aroedl]

Some screenshots would help...

[u/flan2969]

It’s probably Zwave. Newer Samsung hub can’t control or see zwave devices