Non SparkPlug MQTT Testing

First time Ignition user.

Trying to get MQTT data (non sparkplug) into Designer 8.3.1 via Gateway with Custom Namespaces, Windows 11.

I have tried three separate MQTT brokers, Mosquitto local, Mosquitto on a remote machine and MQTT-Distributer locally. All three brokers can be r/w via two third party clients.

Via the Gateway logs (and verifying on the broker end) I can see the TCP connections connect and disconnect as expected.

I have followed the how to instructions but can see the Gateway is never actually polling any of the topics, have tried countless combos. I believe this why I have never seen anything populated in the tag browser in Designer?

I have disabled Elecsys and Sparkplug B. I can see the annoying “IamHost” being populated in Brokers. I have also reinstalled from scratch as I notice the Custom Namespace doesn’t always clear when deleted.

Any ideas?