This model has been in testing for 3 years and it passed all tests so far.
It already past sevral test and it solves a lot of problems that require dark energy or matter. And problems introduced by the James Webb telescope. It also confirmed cosmic chronometer findings on the expansion history.
It does not disprove models, it just shows that dark matter and energy are not needed and explains why we can’t find them.
This kind of fringe research keeps showing up. It’s very popular among non-scientists and apparently easily dismissed by those who know what they’re talking about. I’m by no means an expert, I’m just here to drop a link to a relevant video: https://youtu.be/PbmJkMhmrVI
There was also research lately, that the universe could be indeed twice as old.