Fusion reactions account for all of the elements of the Periodic Table, most of them undesirable to have in the same place.
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Not exactly. The lowest energy element is Iron.
So Fusion can create all elements in periodic table below and including Iron.
All the elements heavier than Iron are created by supernovas, or in labs.
But that’s not what is being investigated.
We are talking about only one reaction right now - merging two Deuterium (heavy Hydrogen) atoms into one Helium atom.
That’s the only fusion reaction, right now, deemed possible to recreate on Earth.
It creates a lot of energy and the product, Helium is quite desirable. We are actually experiencing shortage of Helium.
Sun actually creates most of its energy by fusing four Hydrogen atoms into one Helium, but that would be even harder to recreate here on Earth.
And all the other fusion reactions on Sun, that somewhere in future, nobody even looks at those.
These are not even that important economically, because they generate relatively lot less energy than the abovementioned Hydrogen fusion.
I don't think we will see commercial fusion energy production in our lifetimes.