There is not. The Dyson Sphere is (now) a sci-fi concept that was never based in reality. This is from the guy who wrote it. It was a joke paper because he thought that SETI was a waste of time, just like that paper he wrote. Look up the paper, it literally won’t take more than 15 minutes to read, it’s like 1 page long and there is NO math or science in it. TLDR: We’d have to disassemble a planet the size of Jupiter to get enough “raw” matter to build one. It says nothing about how that matter would be converted into usable materials.

Then for a billionaire to pretend to be a physicist just because he’s got money, who won’t even bother reading the source papers, shows their sheer stupidity to even utter the phrase “maybe we could build a Dyson Sphere in our lifetime”.