Some apps never made a version for the Watch. Some apps never improved their buggy and feature-less Watch version after making the initial one. And more and more apps have been backing out of the Watch.
This was one of the reasons I abandoned the Apple Watch altogether. I owned a Watch for two years. I was hoping to occasionally be able to take the cell-enabled Watch outside without the phone. But the app support was never there.
Over that period I had two small urgent situations I needed to deal with while out and I had only my watch with me. It was better than nothing, and actually showed off what the watch could do in a pinch, but it was not enough and I might as well have brought my phone with me.
Admittedly, the Watch is still worth it for the health features if you are into that, but it's not for me, and it was just another thing to charge. And as Yoda said, "Charge often, you must."