Problem with linking merged document

Hello, I have use case when I need to create link, or table of contents to merged external files. However I'm not seeing any possibility to do that.

Use case. a) One or more PDFs generated using Quest PDF b) Zero or more external files, that needs to merged to the PDF. c) Link on Original QuestPDF generated file to merged file, to easily allow to jump to attachments?

When I can merge additional files with some bumps using temporary files instead of stream, I'm not able to properly create link for them.