You listen to DAB using a DAB radio like you listen to FM broadcasts with an FM radio.
If you’re listening to something on your phone through a data plan, it’s not DAB, but an unrelated streaming service.
If you’re listening to something on your phone through a data plan, it’s not DAB, but an unrelated streaming service.
Even though older iPhone baseband chips had FM receivers, you’d still need break it out and deal with the antenna setup, with the approach taken by others requiring wired headset and shenanigans in the headphone port. That’s more BOM, and user resistance to wireless headphones or newer models whose baseband chips cut the feature.
It used to be a somewhat common feature in phones (including smartphones from other brands), but it usually had quite “eh” reception. And with transitions to DAB, the feature becomes unusable without DAB decoders which I’m sure someone is claiming royalties for.