Thanks PhoneBoy
I've asked my question in the wrong section, our VSX gateways do show routes on in the gateway object -> topology.
My observation and understanding is that "Get Interfaces with Topology" will just tell me the directly connected interfaces with IP's but won't tell me about any routes from routing tables or statics. Its a pain checking the cli or voyager (or whatever its called nowdays) as we have so many fw's.
I remembered that SmartView Monitor used to show the routing table and see its still there accessible via:
device status -> network activity-> scroll to the bottom and click routing table.
confirmed available for Vsec, OpenServer & VSX.
A bit more convenient than authenticating to cli or https 🙂