While I support the logical exploration of concepts such as this one, I think the way the article described the evidence for it is awfully weak.
The closest it comes to make a coherent argument for the concept is the statement "[A]s more black holes were created, the universe's content of dark energy increased in lockstep." Of course there is an increase of black holes over time, as they are formed by the evolution of large stars over time. And, we currently conceptualize "dark energy" as increasing with time, if only because we postulate that it is not diminished by the expansion of the universe that we observe. So, a rough correlation is expected, but that has no implications for cause and effect relationships.
So, the whole concept hinges on the idea of some tighter correlation, implied by using the word "lockstep". The article implies that DESI data shows that dark energy is not uniform, and is correlated in 'Lockstep" with black hole formation, implying differences in black hole formation rates correlate with non-uniform dark energy density. That is what should have been described in much more detail for readers. How is this data acquired? How is it interpreted? What exactly are the correlated parameters? How strong is the correlation?