Paywalled article here, I'll share once I have a non-paywalled link (hopefully soon): https://www.nature.com/articles/d41586-023-03610-5
The summary: astronomers spent a lot of time asking SpaceX and other large satellite operators to pretty please make their satellites fainter and/or use fewer satellites. And then BlueWalker 3 was launched by some tiny company and is one of the brightest things in the sky. Asking nicely isn't working: international regulation and pollution penalties are needed.