My impression is that CLJS, while an amazing way to write frontends with react, suffered from an incomplete/fractured tooling ecosystem, with the official maintainers leaning on the community to develop the 'batteries' and several good but incomplete and unofficial solutions being offered (lein-cljsbuild, figwheel, boot, etc).

I'm not actively involved with CLJS development anymore but last I checked that still continued, with tools like figwheel/deps.edn/shadow-cljs all sort of doing similar things differently, and there being good-but-not-as-good-as-clojure support in different editors like emacs, intellij and vscode. Similarly, there were a number of different, but still alpha quality ways, to use cljs with react native, all suffering from some major pain points.