Currently it's not possible to support any port or multiple, specific ports with a single pattern. The workaround is to create two origin patterns such as "https://*.example.com" and "https://*.example.com:*".
One idea is to enhance the pattern syntax with a comma separated list of ports or a wildcard:
https://*.example.com:[8080]
https://*.example.com:[8080,9000]
https://*.example.com:[*]
This was originally reported in #26892.
Comment From: korektur
@rstoyanchev can I do the change myself and open a merge request?
Comment From: izeye
This seems to have been meant to be closed by @rstoyanchev as it has been superseded by #26927.