find my/ apple watch-VERY wrong location, status.

3 Days ago, I inadvertently left my Apple watch about 30 miles away in a known location. It was definitely connected to my iPhone, as of about 9PM that day. I assume it died. I got home, then realized I left the watch somewhere. <Find My> indicated it was in same location as my phone (at my home), as of 11:30-ish PM, that same night, stating that was last known location. Of course, it was NOT. Playing sound also reflected sound was playing, and it was not. How could it- it was not online! The playing sound messaging is FALSE. The location of the watch indicated was Very False, rendering <Find My> not able to "find my___". This service is not usable if it reports incorrect location information to that degree.

Does Find My assume that the location of my apple watch is the same location as my phone, regardless of if it is NOT? I found dead watch yesterday in this location (30 miles away)- so it was NOT with my at 11:30PM when it claims.