Does the converter see third party components ?
If so, would it attempt to create an equivalent or does it mark the section and move on ?
It has 2 strategies for it:
1. Search from the project's sibling directories, meaning the other directories under its parent directory. If it finds a unit that is used by the project, it is also converted and added to project.
Many projects deliver their libraries that way.
2. Replace units, types and function calls with something else. There is a predefined list of replacements but the user can edit them in conversion settings dialog.
Unfortunately replacing 3rd party types with fallback types does not work very well because their properties are different. Often many properties are lost and the functionality changes.