The South Korean artificial sun, which goes by the name KSTAR (Korea Superconducting Tokamak Advanced Research), has made an important scientific discovery concerning nuclear fusion by being able to sustain plasma in high-confinement mode for a period of 102 seconds while simultaneously managing to keep plasma temperature at 100 million degrees centigrade for 48 seconds. This development by the Korea Institute of Fusion Energy (KFE) is another move towards achieving clean fusion energy, whose ability to generate unlimited amounts of electricity with little to no carbon emission is promising.
IIRC that chart only shows US Government investment / spending. A lot of other countries, such as South Korea, are spending on this and even here in the United States large sums are being spent on it by Venture Capitalists.
The “actual funding” line is wildly out of date since there’s several Fusion Companies that have spent more than that each in the past few years.