FM receiver on phones + 3.5mn jack was a crucial source of local radio transmissions. I suspect some phones still ship radio receivers but the popular types like Samsungs and iPhones don’t seem to care (or perhaps that competes with their music and podcast markets).
Here in Italy since 2020 it's not legal to sell a device that has an FM receiver if that device doesn't also have a DAB/DAB+ receiver, so many companies have been shipping software updates that disabled the FM receiver app even if they were compliant on older phones. Kinda sucks.
That sucks! As long as a device can decode the signals, I don’t see why they should phase it out just to be compatible with DAB+ (especially when infrastructural costs are not a major factor).