I need to test the Apple Pay (sandbox) in Magento 2 before uploading it to production environment and the Apple's requirement is to have a valid certificate
https://developer.apple.com/apple-pay/sandbox-testing/
and the problem is that the environment (staging) that Magento Cloud provides does not have a valid certificate. The valid SSL (https) is only to the final domain in production environment.
How I can do it, please? or How you test Apple Pay?