Also from my side a very warm Welcome to the Wefugees Community and thank you for reaching out to us.
If you are able to organize documents and proofs which are supporting your reasons for the asylum application (or better to say the reasons fleeing your country of origin), you can definitely and should even share them with the BAMF - also if you already had the interview.
In case you are unsure about the nature or the importance of the documents, I would advise you to consult a refugee counselling office (a so-called "Asylverfahrensberatung" would be the most specialized) to discuss it.
If you need help in finding such a service close-by, don't hesitate to share your approximate location with us and we are happy to make some research.
All the best,