How to Access integrated ESRS Gateway GUI in Unity

Can the ESRS Gateway GUI be accessed if the gateway is integrated into the the Unity box?

Would it be accessed via https:// :9443 or is it another method?
Would you use the same admin username and password to log into the Gateway?

The reason is we (the ESRS E2E Connectivity team) are getting "ESRS File Old" Alarms due to a bug in the ESRS Gateway code.
This issue is fixed in ESRS Gateway version 3.22.00.06.

We would like to see if we can upgrade the ESRS Gateway version without upgrading the Unity Code.