It might be net energy gain when considering just the energy needed to sustain the reaction, but I doubt it accounts for the energy needed to power and cool all of the infrastructure that makes that reaction possible. They never mention that part.

In December, Lawrence Livermore first achieved a net energy gain in a fusion experiment using lasers. That experiment briefly achieved what’s known as fusion ignition by generating 3.15 megajoules of energy output after the laser delivered 2.05 megajoules to the target

The laser energy is not the only energy input (or even the largest part) required to run these experiments.

Here is a good (2 year old) video on this topic: https://www.youtube.com/watch?v=LJ4W1g-6JiY