When fusion or fission occurs you get new atoms.
It’s Hydrogen that’s existed since the universe cooled enough for electrons and protons to make atoms. Seconds after the big bang.
That’s most hydrogen.
It’s never been fused into heavier elements just still sticking around and caught in the planetary part of the solar system rather than the sun itself. Or any previous suns.
There’s some helium like that but most helium was formed inside suns later, and heavier elements all formed later in suns or supernovas.
Nope, the broadcaster just issues a (sometimes tongue in cheek) apology and everything carries on.
The US broadcasters risk breach of advertising contracts and losing money over it.
The UK broadcasters will get a small fine if they don’t apologise and do it regularly.
And the public in the UK generally don’t care.