Thank you for reaching out to the Wefugee Community!
It is not clear to me, what you exactly mean with "Bescheinigungsduldung".
However, in this thread you will find more details on the residence permit according to the Residence Law §25b ("sustainable integration"): https://www.wefugees.de/803329/asylum-rejected-just-finished-training-get-residence-permit?show=803376.
As your case is very complex and the residence permit is depending on many different factors, I would recommend you to seek for individual legal advice. In Karlsruhe, the AWO could be a first contact in this regard (https://www.awo-karlsruhe.de/leistungen/besondere-lebenslagen/migrationsberatung/).
I hope this helps and please get back to us if you have some further questions.
All the best,