You’re welcome!
Please consider marking my post above with the Solution tag. It will automatically place a check-mark next to the topic’s title which signals to other users that this topic has been resolved. This helps users find answers to similar questions.
For more information about the Solution tag, refer to guideline 21 in the FAQ.
I’m unfamiliar with the specifics of Daikin devices.
My HVAC unit has an auto mode. When set to auto, the hvac_action attribute is displayed and its value is either idle, heating, or cooling, depending on the HVAC unit’s current activity.
I checked the Daikin integration’s documentation and there’s nothing mentioned about the behavior of hvac_action.
I also checked the Github Core repository for open Issues (bugs) concerning the Daikin integration and found no reports about hvac_action disappearing from view. Perhaps no one has ever noticed this odd behavior (or it’s considered to be normal for this device).
Maybe the hvac_action attribute appears only when the device is actively operating (heating or cooling). However, that’s just a guess; I don’t know why the hvac_action attribute isn’t always displayed for your Daikin device. It seems like a bug to me.