A bit late to the Deno 2.0 party, but I've just released a tool that lets you extract application code and npm packages from stand-alone `deno compile` binaries.[0]
Additional information is available in the companion article.[1]
[0] https://github.com/theGEBIRGE/DenoDig
[1] https://gebir.ge/blog/denos-getting-digged-down-12/
Thanks to @h0ng10 for the input!