Awful lot of sites have icons on them. I can't recall ever seeing icon credit. Copilot is like a year old.
If it's not done, even in a comment inside the HTML... well, it would be nice if it were :)
Rather I'm pointing out that this is some weird "back in my day things used to be X" where we're still in that day and I can clearly see with my own two eyes that things aren't X. Whatever other ills can be laid at llm code generations feet, icons not getting credited isn't one of them.