Hello,
I've filtered my Fortinet firewall from Spain, and the device uses port TCP/18883 to display its status on the GoodCloud website and for the mobile app to work. It also uses port TCP/59127 (this could be a random port, although it seems to always appear the same in several tests).
The first port is AWS services. The second is GoodCloud. However, if you don't have access to the firewall, it'll be difficult to resolve this. It's possible that your company only allows HTTP/S.
And if you have access to the firewall, you should be able to do the same thing yourself.