Only information about the last data update is displayed in the dashboard. If no data is updated for days in a row, it may pose a question about whether the script is working.
Heartbeat functionality was implemented to clarify all potential doubts. Each time the script is executed, heartbeat or markup data is written in a database. The timestamp of the last heartbeat is displayed in the dashboard as the "last data " update. See the attached screenshot.

https://git.qt.io/anwojcie/grafana_scripts/-/commit/ff188ad12983326534359a9514f207c6df9a9425