Pair an Apple watch with an iPhone for display in an Apple store?
So, I would 100% ask for help at the store in setting up your Watch rather than trying to use the display devices for pairing or setup. The display devices are heavily managed, your personal data could be synced up to Apple’s account if you managed to do this.

They have staff dedicated to the task of getting you set up and have equipment specially prepared / wiped / sanitized to help you with getting your watch set up.

If you can’t borrow a friend’s device / wipe it and then set it up, I would seek help at the store and only with staff help - attempt to pair your device to the display phones. Also, try Apple support online - they might be able to help you get set up watch free or make an appointment so you know you’ll be seen when you arrive.


https://www.apple.com/iphone-and-apple-watch/


I don’t know what WWDC 2020 will bring, but you really need an iPhone to set up and do some critical tasks with your Apple Watch with the current version of watchOS and iOS.