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My watch series 0 works with my iphone X being on the latest iOS.
I’m using a Series 0 as a sleep tracker. I just started and had only used it 3 nights when I upgraded my xs Max. Now the display on the watch is zoomed out (like everything is really large and doesn’t scroll right) and is not syncing.

So I don’t know if it’s iOS 12.2 or something else... not enough data.
 
I’m using a Series 0 as a sleep tracker. I just started and had only used it 3 nights when I upgraded my xs Max. Now the display on the watch is zoomed out (like everything is really large and doesn’t scroll right) and is not syncing.

So I don’t know if it’s iOS 12.2 or something else... not enough data.

You might have touched the watches display in your sleep causing it to zoom in. Try double tapping with three fingers on the display.
 
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