@bradford.clarke thank you for the info!
I am curious how often is the Air Quality value updated in the Ikea app, when used with Drigera hub?
Does it update every second (if you intentionally rapidly change the air quality ), or less frequently ?
@rad1 I see only the Air Quality Level (Good, Moderate, Unhelthy, etc... ) available on Apple Home.
Are you looking for the numerical value (the airQualityIndex) ?
As there is not a standard pm2.5 attribute specified in Hubitat Capabilities List, I am afraid that the p,2.5 is not possible to be shown using the official / inbuilt HomeKit integration.
Update: an request for adding Dust Sensor capability in Hubitat was published here.