However, the battery was dead and I did not realize it since I have been using the Garmin Fenix 6 Pro as my primary watch for everything.
In the past, I have had the battery replaced at a watch shop, but I cam across the following video and it felt like it could be within my wheelhouse.
It was a straightforward as the video suggested. I had a little trouble getting the battery cover off and then putting it back on, but otherwise it was as easy as the video suggested.
I was thrilled to having a working backup watch again for $1.97 plus tax for the CR2016 battery.