Lost my watch
if i lost my watch can it get replaced with apple care
AppleCare+ has two different flavours depending on worldwide regions. In base form it is available as AppleCare+ which gets extended cover for damage and failures. In some regions there is an enhanced version with higher cost, "AppleCare+ with Theft and Loss coverage"
We don't know where you live, so we can't guess whether you can get (or might already have) the Theft and Loss version.