I just did, and I have less than 15 related results in the first 4 pages, only two of which are sources I've ever heard of before (washingtonexaminer and nypost). I'm logged out of google, but it's been a while since I deleted my cookies.

I've read literally hundreds of pieces on the hunter biden laptop, about half of them from republican leaning outlets, (I try to keep a balanced diet....) and none of them mentioned DKIM validation.

(For the record: I don't live in the US, I don't watch television, but I do try to keep a balanced news diet)