[VaxWithSex]

It's a different environment than the sun and other isotopes are fused. The plasma is a lot less dense, with a lot less pressure but much higher temperatures. The current technology will not generate other elements. And Gold etc are not created in the sun via fusion. they are generated by a different process involving stellar catastrophies.

[ThomPete]

It's a different environment which is in principle possible to recreate. First step is to get basic fusion working.