MQTT Messages - Terminal like screen on OH

I would like to know if its possible to have any MQTT messages sent to a topic to be displayed on its own page on OpenHAB.

When my homemade IOT devices connect/reconnect to my MQTT broker they send their device name to the /DEBUG/ topic. I would like to be able to easily see the messages from OpenHAB rather than keeping a Terminal window open on the laptop.

You can create a String Item that subscribes to that topic. But it will only keep and show the most recent message.

But if your intent is to know whether or not a device is currently connected, make the Item a Switch and toggle the switch based on the messages on the debug topic.