Hello,
Thanks for the excellent question, we’re always looking for feedback about what types of features people need from our Cloud WordPress staging environment.
At this time, all Cloud WordPress installations are running on PHP 7.1.30, with current versions of Apache and MariaDB, and these values cannot be changed.
We do have plans to allow developers to change the PHP version, but I don’t have a precise timeline on that feature at this time. I’m not aware of any plans to allow changing the actual Services for Apache and MySQL, but I will definitely let the development team know about your use-case and need for this feature.