I looked up your model on YouTube and found several videos. The models are slightly different, but all of them are 22 UDL. Some have the television mount above the kitchen counter on the outside wall and some of the television mount on the end of the cabinet, facing the back window.
If it were mine, I'd mount a swivel arm on the end of the kitchen cabinet above the sink. Here's a video with the television above the counter on the end of the cabinet facing back window. It's a quick shot, but stop the video (the letter "k" on your keyboard for pause) and you'll see it at 4:44 into the video.
Click here. Other videos show the television mount on the outside wall above the counter and others show no television mount at all.
Still, it seems the best and most logical place for a solid, uncomplicated mount, would be the end of the overhead cabinet.
Does your model have an antenna on the roof, and the power booster installed? If not, you'll also need to figure that out too.