JetBrains (which created Kotlin and IntelliJ) isn't interessted in supporting other IDEs much, which is why you'll get the best developer expeience with IntelliJ/AndroidStudio even in the community versions.
Every other IDE has to develop syntax highlighting on it's own, though I heard the the community driven
Kotlin Language Server was recently updated to Kotlin 1.8(!?) (but that doesn't include syntax highlighting but refactoring/jump to declaration).