Rudy Giuliani and Tucker Carlson claimed to have first-hand access to the information; Tucker Carlson also said that he doesn't wish to reveal any further information because he didn't want to kick a man who was already down.

I remember when people were saying The Intercept was censoring Glenn Greenwald at the publication he co-founded for not jumping on the Hunter Biden story. In retrospect they made the right call to avoid joining their outlet's credibility with the fact that Fox News personalities could, at any time, just decide not to release information on the alleged basis of not kicking a man when he's down.