He also listed uninhabited Australian islands and a US military base on an otherwise uninhabited UK island as separate countries. So I would guess China decided that the country list is basically meaningless.

No. They are just a pair of cheap headphones that are usually in my pocket for when I want to hear a podcast or audiobook on my phone. But anyway you can just take off the adapter at any time.

There are adapters that let you do both. Of course that might not be as convenient as native support, but still.

When I replaced my phone I just attached a USB-C Adapter to my wired headphones. It works exactly as before.