Got my trailer back to the house today and looked quickly at the fireplace before I had to leave town. Our remote for the TV/fireplace looks just like the big one the OP shows. Didn't spend enough time to figure the sequence but the TV/fireplace button turns on both in conjunction with the power button if you depress them in the proper order I guess. I was gathering it up to take to the dealership because I replaced the Furrion TV and didn't realize the remote operated the fireplace as well. Oh well, doesn't matter, I'm going to take it to them because I have a separate remote for the fireplace! It looks like the one Javi has.
Danny & Susan wife of 53 years
2019 Ram 3500 Laramie CC SB 6.4 4x4 4.10
2020 Montana High Country 331RL