We used to have earbuds that don’t need to be charged because they had a headphone jack, didn’t get lost so easily because they had a cord attached to a headphone jack, never lost the bluetooth connection because they had a headphone jack, and they cost less because they had a headphone jack. https://bsky.app/profile/daisyfm.bsky.social/post/3l3mfjc6sn62k
Samsung had headphone jack until note 10 and ip67/68 rating since s5. Similar story with other brands. What you described are two separate trends.
Cheap phones still have fm radio support. Pretty sure it’s disabled in software in everything else, and you need cabled headphones to serve as an antenna either way (not sure if usb c works).
That makes me wonder how the Zune pulled of having a pretty solid and clear radio without an antenna. Must have had one wrapped around the inner casing or something.