It doesn’t work that way, well it does but only in the event that both President and VP are removed or killed at the exact same time and that ain’t gunna happen.
If Joe goes first then Kamaltoe becomes President and nominates a VP.
If Kameltoe goes first, then Joe nominates a new VP
It will only get to the speaker if they both croak or resign at the exact same time.
This. And I have little faith a Republican majority in the Senate would refuse to approve the nominee even after the election. Republicans are spineless appeasers for the most part.