Yes, there is a lot of new code being written for the JVM. E.g. Kotlin is a fine choice as a language for a new backend project these days with excellent support in frameworks like Spring Boot. Also it is a drop in solution in pretty much any Java project (as in you can mix the two and they interoperate without much fuss). Modern Spring Boot is pretty nice and getting nicer with each release. In terms of feature set it pretty much runs circles around anything in the javascript ecosystem. And with a language like Kotlin it's not a bad programming experience either.

As a language Kotlin is sort of similar to typescript with a few nice features added, a bit more elegant syntax in some places, a bit richer in some places, and of course none of the madness that comes from javascript compatibility. I've seen typescript developers pick up Kotlin and liking it. Other languages it is similar to are C# and Swift. Swift is so far not used a lot for backend stuff but I could see that change. All of these can already compile to web assembly and the tooling for that is likely going to mature in the next few years to the point where you can target browsers, node.js, and native with a wide variety of languages.