Maybe you missed this blog post of Timothy Snyder [1] from October last year:
Is it a stretch to suppose that Prigozhin is sparing whatever valuable men and material he has left? He has been openly recruiting Russian prisoners to fight for Wagner in Ukraine; I would venture the supposition that he is sending them to die and keeping back the men and equipment who might have a future in some other endeavor. [...] In the overall logic that I am describing, rivals would seek to conserve whatever fighting forces they have, either to protect their own personal interests during an unpredictable time, or to make a play for Moscow.
