Hi gary & chris,
you might want to check if the display connector sits properly on the motherboard or see if there is any dirt or remnants of water inside the watch which may affect the touch function of the display.
See this back cover guide to get inside. The top connector in the last image is the display.
Also you can read this thread (Samsung forum) on water damage on Galaxy watches for more background information.
If still under warranty from Samsung you may be eligible for a replacement or repair.
Samsung Galaxy Watch Active2 Back Cover Replacement
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