The nature of free will has long inspired philosophical debates, but it also raises a central question about the fundamental nature of the universe. Is the cosmos governed by strict physical laws that determine its fate from the big bang until the end of time? Or do the laws of nature sometimes allow for things to happen at random? A century-old series of physics experiments still hasn’t been able to settle the question, but a new experiment has tilted the odds toward the latter by performing a quantum experiment across billions of light-years. ...This is just another Bell test experiment, confirming what has been the conventional wisdom for 90 years. There are no local hidden variables. It doesn't really have much to do with free will.
Rather than using a random number generator in the lab to decide which photon measurement to make, the experimenters used quasars.
Quasars are brilliant beacons of light powered by supermassive black holes in the centers of distant galaxies. The team used random fluctuations in the light from quasars to determine how the photons were measured. Since the light from a quasar has to travel for billions of years to reach us, the fluctuations in brightness happened billions of years before the experiment was done—billions of years before humans even walked the Earth. So, there is absolutely no way for it to be entangled with the experiment.
The result was just what quantum theory predicts. Thus, it looks like there really are no deterministic hidden variables, and randomness is still possible throughout the cosmos.
A lot of experiments use randomized inputs, and that is easy to do if the experimenter has some free will to make choices. If he doesn't, then one can question where the randomness is going to come from. You could toss coins, but then you worry that the coin tosses have some subtle correlation with the particle spins in the experiment, and that the correlation is somehow tricking us into believing in quantum mechanics.
So you can get your randomness from a distant quasar. Does that make you feel better as a result?
All this shows is that the known laws of physics are not 100% deterministic. It doesn't really show that we have free will. It does disprove arguments against free will that are based on saying that the laws of physics are deterministic. The known laws are not deterministic.