Here is an article on this topic, which comes to a mixed conclusion.
"The article suggests that more musicians rather than fewer might now be able to earn money from recorded music than in preceding recorded-music systems. But it also proposes that the current system retains the striking inequalities and generally poor working conditions that characterised its predecessors, and that better debate requires greater transparency about usage and payment on the part of streaming services and music businesses."
Here's an article about Germany, which claims streaming is not worse
"However, the current streaming-dominated music market does not fundamentally perform worse compared to the former CD market: in 2023, more than twice as many music creators earned revenues above the basic tax-free allowance compared to 2002."
"The article suggests that more musicians rather than fewer might now be able to earn money from recorded music than in preceding recorded-music systems. But it also proposes that the current system retains the striking inequalities and generally poor working conditions that characterised its predecessors, and that better debate requires greater transparency about usage and payment on the part of streaming services and music businesses."
https://journals.sagepub.com/doi/10.1177/1461444820953541
Here's an article about Germany, which claims streaming is not worse
"However, the current streaming-dominated music market does not fundamentally perform worse compared to the former CD market: in 2023, more than twice as many music creators earned revenues above the basic tax-free allowance compared to 2002."
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5474735