Hello and welcome to Apple Support Communities Shane1501,
Thank you for contacting us. You have come to the right place and we are happy to assist you. We understand you're having an issue with Apple Pay on your watch. We can understand why you’d reach out for a solution. To start, make sure you have the most current operating system on your devices. The article you were looking at is the resource for Express Transit specifically, but you should still be able to double click to verify on other purchases as well, as long as Apple Pay is an option. Please see the resource below.
Make purchases using Apple Pay
If you need further assistance after following the link above, please don't hesitate to reach out.
Thank you for contacting Apple Support Communities.
Best regards.