The only time I’ve heard of cats getting lost, other than when they are dumped somewhere, it’s when the family moves and they try to get back to the old house.
With a collar and tags, it probably has a home nearby. Especially since it wasn’t excited about the sardines. It’s very kind of you to worry about him/her.
If we continue to see kitty we will be calling Bubba to come help us trap it so we can see what the tags say.
Domestic animals don’t last long living outdoors here.
Too many wild predators to deal with.