Can´t access child theme´s scripts dependencies found in parent

If the parent theme bundles all vendor scripts in one file, you can’t require/enqueue them separately. From WP’s point of view, they are one single resource/dependency.

Look into any page’s source-code or use a plugin (such as “debug this”) to get the script’s register name so you could specify it as dependency. In your case it could be {parentThemeSlug}-main. It’s not the file name, but the register name which needs to be specified in the dependencies array (i.e. jquery.min.js is jquery). I usually look it up in parent theme by finding the register/enqueue function.