Philips hue via Ikea home smart configured not visible in home app

LS,

Philips hue Filament bulb configured in Ikea home smart App is working fine and can be managed via the app, but Bulb is not visible in Apple home app.

In google home the Philips hue bulb is working fine and can be managed via the google home app.

so my first conclusion is that Apple home is not supporting hue bulb configured via a tradfri (ikea) bridge.

please advise.

kind regards

Frank