> almost triple the age of our sun.

In this insanely hypothetical scenario, would it be possible to see a sun before our sun? (In the same galactic vicinity)

I was under the impression that our sun is not large enough to form the heavier elements on earth and this means supernova or collision of neutron stars had to be responsible for creating these elements, some of the stuff flying off this explosion formed our solar system, so we could see those progenitor stars.