The institutions, projects and individuals named in the article are, in order of appearance:

--1-- Charlotte Mason (not, so far as I can tell, affiliated with or funded by the Simons Foundation)

of the Cosmic Dawn Center (not, so far as I can tell, affiliated with or funded by the Simons Foundation)

which is associated with the Niels Bohr Institute at the University of Copenhagen (not, so far as I can tell, affiliated with or funded by the Simons Foundation, except that the NBI hosts something called the "Niels Bohr International Academy" that has taken money from the Simons Foundation; it doesn't look to me as if Charlotte Mason has any connection with this)

and also with the National Space Institute at the Technical University of Denmark (not, so far as I can tell, affiliated with or funded by the Simons Foundation)

--2-- The James Webb Space Telescope (not, so far as I can tell, affiliated with or funded by the Simons Foundation)

--3-- Jenny Greene (not, so far as I can tell, affiliated with or funded by the Simons Foundation, though she did once give a talk at the Center For Computational Astrophysics at the Flatiron Institute which is part of the Simons Foundation)

of Princeton University (not, so far as I can tell, affiliated with the Simons Foundation though I expect it's taken some of their money, but in any case no one needs an excuse for reporting on work done at Princeton)

--4-- Unnamed-in-the-article researchers who found that a "little red dot" is likely a supermassive black hole without stars around it; the Simons Foundation is not mentioned anywhere in the paper they published about this; neither the first-named author of that paper nor the one quoted in the linked article has obvious Simons connections, and both are at the University of Cambridge which, again, no one needs an excuse for reporting on the doings of.

--5-- Rachel Sommerville of the Flatiron Institute. Here there really is a Simons connection; the Flatiron Institute is part of the Simons Foundation. It does computational research in scientific fields, astrophysics being one of them.

--6-- "a meeting in April 2026 in Helsingør, Denmark" about the early universe; this was titled "Charting Cosmic Dawn in Copenhagen" and so far as I can tell has no Simons connection other than the fact that two of the 21 people listed as "invited speakers and tutorial leads" are from the Flatiron Institute, which seems innocuous since the F.I. does in fact do scientific research in this area.

--7-- Hakim Atek (no Simons connection so far as I can see)

of the Paris Institute of Astrophysics (no Simons connection so far as I can see, though I did find evidence that at least once the Simons Foundation has provided funding for a person working there)

of the Sorbonne University (not affiliated with the Simons Foundation; I'm sure they sometimes take S.F. money but, yet again, this is not an institution that anyone needs excuses to report on the work of)

So, I find one, count 'em, one, instance of a Simons-associated entity in the article. How very sinister of Quanta to mention them and hide their own affiliation. Oh, wait: "Editor’s note: The Flatiron Institute is funded by the Simons Foundation, which also funds this editorially independent magazine. Simons Foundation funding decisions have no influence on our coverage."

You may, of course, choose not to believe that last claim. You might be right. But in this article I don't see any obvious sign of bias; they reported on a whole lot of things most of which have no particular connections with the Simons Foundation, and the one S.F.-affiliated thing they reported on does seem relevant. I can't rule out the possibility that Sommerville's work is actually bad and was reported on here only because of the Simons connection, but e.g. she is one of those invited contributors to that conference in Copenhagen which doesn't seem to have had a Simons connection and does seem to have been run by reputable astrophysicists.