HAMs are using it as a MeshCom terminal: https://icssw.org/en/meshcom/

Halfway through this video is an example, contrast it with the iOS app shown before: https://www.youtube.com/watch?v=aWtqm7lbYoo

This is a deeper dive into specifically the T-Deck and Meshtastic: https://www.youtube.com/watch?v=L1hvsYEX7WE