My 2017 (2109S model) has a removable swivel mount. It comes off by lifting up, but it's really tight I had to smack the bottom of the TV a couple times to get it started. Also, mine has a very strong magnet that holds it tight against the wall for travel. The magnet is really strong and I grab the top and bottom of the TV in the center and give it a yank to pull it out. Here's a picture of what my mount looks like and I also have one outside from the factory:
Ray