I purchased a watch face using Garmin Pay in the Connect IQ store. The money was taken from the card I have connected with Garmin Pay and the transaction has completed with money leaving my account.
The watchface still isn't available on my device, and if I select it in the store or from "My Watch Faces" it shows the message "your order is processing. check back soon".
Interestingly, it doesn't show in my list of "purchases" in the store either.
The big irony here is that I've never had any problems buying a code for "pro" versions of apps and faces in the store before, but Garmin Pay seems have complicated things and not made them simpler.