Hello! Paul here, from the Guru team.
We have a great help doc on Apple Pay that I would definitely recommend checking out! I'll link it for you here.
The most common issues to check are that your store is using SSL, customer accounts are disabled or optional, and that the device you're using to view your store meets the requirements set by Apple. Give those a check over and see if thats the problem! If you'd like to speak with us at support, please do, and we'd be happy to help you find out whats going on! https://support.shopify.com/
|2 hours ago|