All the sections for metadata have been filled out and all the questions answered about data privacy. What are we missing?
How could we know without seeing exactly what you provided. You think you provided all, that's not the reviewer opinion.
It seems the reviewer has found you use third party libraries (which) and is concerned about them. Up to you to prove it is harmless, by providing detailed and convincing answers to all the questions.
There is little we can do on the forum.
Note: why did you tag your question as Natural Language ?