I think what @xgdgsc is trying to say is that Infiltrator.jl is a very nice, very fast debugger (though REPL-based). I myself also use it as my main debugger.
For usage, see the blog post above, the Infiltrator.jl docs and for example this discourse How to use Infiltrator? - General Usage - Julia Programming Language.
Adding the @infiltrate (or Main.@infiltrate) statement to your code, is kinda like adding a debug point in the VSCode editor.