Hi:
This is currently not possible. Verse relies on the Blueprints VM for now, which means inherently it’s tied to Unreal, and in this case, UEFN at the moment. The team is working on a new Verse-specific runtime and the intention is that Verse is a general-purpose programming language that can eventually be used within Unreal (and standalone altogether), but we’re not quite there yet.
The LSP is included, but that only performs parsing and semantic analysis, and doesn’t invoke the full compiler toolchain (e.g. no Blueprints bytecode is generated). You can play around with it to test-drive Verse code in general and get a feel of the syntax outside of UEFN, but it’s not really a substitute for a REPL or anything of the sort.