I've got a Sony A6400 (4k video is nice for my business) and of course the photography is only limited by my skill as well.
About to get a pixel 4 as well.
I don't have any settings tips as I am an extreme novice, but the dramatic difference when you frame a shot by adding items in the foreground and background to be out of focus while focusing on a target in between the two is a great first step imo to anyone taking watch pics for the first time.
In simpler terms, put something close to the camera and something away from the camera and then focus on an object between them. I don't have any with watches on my computer right now so these will have to do:
Before:
https://imgur.com/7SLjcAy
After:
https://imgur.com/3XkXg94
A good way to do this with a watch would be a shot focused on the watch with the watch box or something else with the watch logo in the background slightly out of focus.
Before anyone asks, I was at a friends house and I drink much better beer haha