lost apple watch not paired

Hello,

I just realized that I lost my Apple Watch 2. This is the day after I upgraded to an iPhone XR. When I went to my phone to use "Find my Device", it doesn't show a watch and it doesn't show up on the map either. It's almost as if it never existed. Is there any other options out there to find my watch other than "Find My" or Law enforcement? Is there a way that I can find the location of a previously paired watch? I'm hoping that there is a way that support can find my watch using my serial number.

Any help with this issue would be greatly appreciated.