Apple Watch 5 Availability

Sorry to hear that, most of LA's apple stores are temporally closed. Opening date TBD.

If It doesn't hurt for you to purchase from a reseller, best buy has a lot of locations across LA that still might have the Apple Watch Nike Series 5 (GPS + Cellular) 44mm Space Gray Aluminum Case with Anthracite/Black Nike Sport Band - Space Gray Aluminum available.

As such, being an authorized reseller, they'll also offer to sell you applecare which will be honored by an Apple store (Check for Availability, may differ between Best Buy stores). They probably also sell a bunch of other accessories for the apple watch too.

You can order it online here, it'll ship from the nearest Apple store or distribution center.

https://www.apple.com/shop/buy-watch/apple-watch

For specific Apple Store availability. Call them. You can find the list of stores and their contact info here - https://www.apple.com/retail/storelist/

For a list of all stores that sell apple products (Best Buy, Costco, etc) Go here -

https://locate.apple.com/