Does Gold really come from Supernovas? Do we really know that the origin of gold was in a supernova explosion?

I am talking about the gold we find here on Earth.

So then how are we sure that Gold actually came from these explosions.  Did they go back some million years ago and figure out that Gold was made in supernova.
We don't need to see things to understand them.

It is now generally understood that gold is formed in neutron star collisions.  The evidence for this partly theoretical: Models of neutron star collisions suggest they would produce large amounts of heavy elements, and regular supernovae would not produce gold in the right amounts to explain the concentrations found in the solar system.

Secondly, we have observational evidence from the collision of two neutron stars, detected by gravitational waves, which allowed for scientists to analyse the light coming from this collision in detail. We can't see gold, but we can see radiation that indicates the presence of radioactive isotopes that will decay to form gold.

This gold would float in the interstellar space for a while until it forms part of the dust around a newly forming star. That dust gathers together to form planets. Most of the actual gold we find came to the Earth carried in by meteorites, as the original gold will have fallen to the Earth's core when the Earth was molten.

So we have a good model for explaining how gold can be formed in neutron star collisions and evidence for this actually happening. That is enough for this to be the generally accepted theory.