Copper plating, is sulphuric acid necessary? Alternative to H2SO4? Many links and tutorials on copper plating use a solution that contains copper sulphate / sulphuric acid and hydrocloric acid.

In Sweden, Sulphuric acid is almost impossible to get a hold off. You need a license to buy it, and it costs 100 USD to get one...

What does the H2SO4 do in the electrolyte? Is there an alternative to the acid?

I want to plate PCB copper clads.
Copper acetate can be used, at least for a thin layer, and it can be made with chemicals found at home.

To get a bright copper coat, extra acid (vinegar, 5% acetic acid, in this case) or gelatin can be added.

That said, if the plating is for through-hole continuity, it might be simpler and cheaper to use a solderable conductive ink.