[USG Flex H] - Additional info when creating an address object

Maverick87

Hello,
my idea is to add an additional info during the creation of an address object.

For example, in this situation:

What is the "Interface Gateway" of this interface?

In this:

What is the actual IP of the "Interface IP" of the PPPoE interface?
In this case, only after save the information, I obtain the info:

So in this case the "Interface IP" of the PPPoE is the real external WAN IP.

My ask, is to translate what I'm selecting into the actual IP or subnet in real time; this way, I can quickly understand the meaning of my selection.
In the example above, "Interface Gateway," what is the IP address coming from that selection? What does the interface gateway actually translate into?