I guess that the GP didn't talk about the language itself, but the users. For me it looks like Scala and Clojure had lost many of its users because of Kotlin and newer Java versions. Generally I see a decline in the usage of functional languages since their heyday in the 2010s. I guess that's because imperative languages either get "functional features" or are "functional enough" - new ones like Rust or Swift.
I'm not so sure. I wish it were as you say but there are currently 5600 job postings mentioning Scala on LinkedIn in the USA, vs 82 that mention Clojure. 82! In the entire USA. So even in its state of relative decline, Scala might be about 70 times as used in industry as Clojure is.
Even as I flip through the 7 postings mentioning Clojure in all of Canada, only 4 of them seem to indicate the job itself makes use of the language (rather than mentioning it just as an example language as in "* Fluency in one or more languages like Ruby, Clojure, Scala, ReactJS, JavaScript, TypeScript, Java, Python - Deep understanding of internet protocols and standards.")
