All vice presidents have met qualifications to be POTUS, at least age 35, natural born citizens etc…
Ditto on the Speaker of the House and President pro Tempore of the Senate , although I don’t know for sure.
But I know of at least two Secretary of State that are not “natural born citizens.”
(Kissinger and Albright). There are probably others.
Since the vice president is a “heartbeat” from the presidency, I assume that they would have to be meet the same qualications as the POTUS. But what abut the Speaker of the House and President pro Tempore. Do they have to have presidential qualifications?