Delaying AppleCare activation for a new Watch

No, that is written in stone, I’m afraid. I’m a former Apple Store manager and I could do a lot of things that online support could not do, especially if related to a customer service issue. But Apple will not register an Apple Care policy/agreement after 60 days from date of purchase. Nothing can be done, I’m afraid. Just bite the bullet and purchase it before the 60 days is up.

doubt it, it's 60days after purchase

suppose it for them to avoid the legal implications of people leaving the watch in the box for 20years and then wanting to activate apple care+ then