Please share:

Problem: After buying a Plugin or Theme Pack on the phone, Google Play Store on the watch wants you to buy it again. Google Play Store on the watch can be a bit unreliable when it comes to updating licenses. I hope Google will fix this eventually. It takes some time for the license information to transfer, but at least double purchases are blocked.

Multiple Google Accounts?

One think to check though: do you by any chance have multiple Google accounts configured on your phone? If you do, make sure to pick the same account on your watch too. You can swipe down from the top in the Play Store app on the watch and you can pick users on the watch too: Have you purchased the plugin using the wrong account? Send me your order number, I can give you a refund.

Force Google Play to refresh