Not just those, iirc it’s some sort of chip that is no longer put into phones cause of money reasons. I’ve only owned phones with a jack slot and my current phone doesn’t have fm capabilities, I’ve checked.
That’s probably the reason why there aren’t any truly good apps out there. Similar to how phones don’t even have radio antenas anymore. I miss being able to use my old phone with a speaker for the drive in theater. Had to get a new radio Bluetooth speaker to replace it.