Welcome back to the Wefugees Community and thank you for reaching out to us again.
As far as I understood, the topic of applying for an "Ausbildungsduldung" connected to a Dublin case is indeed a bit more complicated. As long as aylum applicants are still in the asylum procedure (haven't received any negative Bescheid by the BAMF), they hold an "Aufenthaltsgestattung" and can certainly not apply for an Ausbildungsduldung. Given the situation that the applicant recieved a negative answer by the BAMF due to the Dublin regulation and holds a Duldung, it will be dependant on the question if the authorities have introduced measures already which are aiming to end your stay in Germany (deportation).
Am I right on this dear @mbeon-Christine or @mbeon-Rukundo? Can you add any details or advice?
Please don't hesitate to get back to us with any further questions.
All the best,