On Kagi (International) I got these results on the first page:

First result: Joe Biden

Further down: Bernie Sanders, Marianne Williamsson, Hillary Clinton

Further down: Article: "Google hides campaign sites of Trump, RFK Jr. and other Republican candidates"

Further down: Ron DeSantis

Between these results there are several links with lists of all candidates.

Did it give you a result leading directly to their canonical campaign website? I can see Sanders and Clinton with international, but can't see DeSantis nor any other Republican candidate (not even Pence).

I can definitelly see pages with lists of candidates, but I couldn't find a single one that would also link their websites and thus satisfy the query, at least indirectly.

The results seem to change as we speak. I no longer have any republican candidates on the first page of search results, but the links in the results are to the canonical campaign sites.