Hi guys for those asking why Apple Pay is not working on Safari, please note that Apple requires you to host a file on your server to verify your domain.
In bubble you go to the Settings page > SEO/Metatags > Hosting files in root directory
See below:
The name should be exactly as above.
As you can see from this example, you need at least a Personal bubble plan to host files.
So even though bubble will allow you to upload the file on a free plan, this file will not be accessible.
For example if i try to access the file in the above example i get this error message from bubble
This means when Apple tries to access this file to verify your site it will fail.
Tldr
To get Apple Pay to work your need a paid plan on bubble - so you can host and access the apple merchant domain association file.