Currently the extension will default to v1. If you want it to use Idris 2, change the path in the configuration to your Idris 2 binary, and tick the Idris 2 Mode checkbox.
But I see no such checkbox in VSCode. This is what I see:
Incidentally, the extension throws an error:
with the Idris2 program in question being a simple:
module Main
main : IO ()
main = putStrLn "Hello world!"
README says,
But I see no such checkbox in VSCode. This is what I see:
Incidentally, the extension throws an error:
with the Idris2 program in question being a simple: