Help needed with custom DTH - Tasmota-HongTat

Do you mean in the device details > history?
This is odd, it should have the registry of the recent capability events.
Using the URL shared in the post below, you can get the Device History from the API:

Also, just so you’re aware, sometimes the sleepy devices become offline in the app, I believe it wasn’t enrolled for the health check (which sends a ping periodically to see if the device is available)