That depends on what preset you select. On long fast, on meshtastic, it's only 1 KBPS, but on something like short fast, it can be something like 10 KBPS, and on short turbo it can be 20 KBPS. Also, to address the channel utilization, telemetry has been disabled in the latest versions by default and you have to request it manually instead of it being sent out automatically.