Even if the present chipset has FM capability, without a suitable antenna (and connection, if that's separate), the reception would be almost useless. There used to be a dongle FM receiver for the iPod classic; it was OK but only under good reception conditions, even probably using the cable between iPod and dongle as an antenna too. Likewise, there would have to be an iOS driver, the ability to tune, switch the audio (digital or analog?? forget the latter) to where it could be played through earphones or loudspeaker, and an app to make the controls available to the user. Neither the additional hardware nor the software exist. And quite aside from Apple Music etc, the additional functionality would be one more tradeoff vs other features in slim and elegant packaging. If it's that necessary, people should have a small portable AM/FM/weather radio at home, and check the batteries regularly. In places with frequent extreme weather, they should probably have two or three of them, keep one in the vehicle, one at home, and the adults should carry one; and places of employment should have procedures in place (as Waffle House is famous for) to be very aware of conditions and how they need to respond to meet their goals with due concern for the safety of employees and customers.
Emergency vehicles and fire stations can have public address systems, too, and the latter probably have generators. All those and more were possible before pocket-size cell phones even existed. Town criers or some such could keep the populace informed before there were electronics. The real problem is that preparedness is pathetic for most individuals and too much local government (Puerto Rico, New Orleans, as memorable examples), and everybody acts like it's someone else's problem.