How do I find my lost Apple Watch Series 8 using Find My app?

Hi, I lost my Apple Watch a while back and I tried to find it on the app, Find My watch. find my iPhone Apple Watch and I about to give until I decide to asked you my security number for the Apple Watch is number is for the watch is GQ*****7Q please find it because I I can’t afford to buy a new watch and it’s been lost for a while and I tried to find it and I got tired of looking try to look for it. I think it’s been lost and Ii can’t afford a can’t afford a new one and I had AppleCare at Apple one before and then it expired then just please find thank you.

[Edited by Moderator]