I read this report on the GRB. Record-breaking gamma-ray burst possibly most powerful explosion ever recorded,
https://phys.org/news/2022-10-record-breaking-gamma-ray-possibly-powerful-explosion.html
An interesting report. I note, "Scientists are also wondering how very-high-energy 18 TeV (tera-electron-volt) photons observed with the Chinese Large High Altitude Air Shower Observatory could defy our standard understanding of physics and survive their 2.4 billion year journey to Earth. This event, because of its relative proximity to Earth, is also a unique opportunity to better understand the origin of the elements heavier than iron and whether they all come solely from neutron-star mergers or also from collapsing stars that trigger GRBs. "The Gemini observations will allow us to utilize this nearby event to the fullest and seek out the signatures of heavy elements formed and ejected in the massive star collapse," said O'Connor."
Looks like r-process elements are or will be studied here and the distance of 2.4 billion light years, apparently causes problems for the energy level observed, 18 TeV. Perhaps this GRB is much closer than 2.4 billion light years
https://lambda.gsfc.nasa.gov/toolbox/calculators.html, using this calculator, 2.4 Gly distance suggested a redshift ~ 0.2. The age of the universe at z=0.2 ~ 11.271 Gyr and diameter of the universe ~ 4.46 Gly when the GRB event took place. Calculations like this go into the interpretation of the 18 TeV energy report. ---Rod