Swift (2014) and Kotlin (2011) are huge because of iOS and Android, respectively. C# came out in July 2000, does that count? However there are post-2000 languages in real use that aren't developed or annointed by huge companies, some started as solo dev projects or academic projects.

There is a lot of news right now about AI writing proofs in Lean (2013.) Lots of people rely on Elixir (2012) and Gleam (2016) is up and coming. I wouldn't give up on Scala (2004) just yet, it's really one of the best languages out there with some great libraries and runs on the JVM. You could argue that Reason (2016) and ReScript (2020) are just dialects of OCaml but they are industrial strength tools that people rely on in production.

...and don't even try to take Clojure (2007) away from any hands that are not truly cold and dead.