Hi @Fareed786,
Welcome to the Wefugees Community and thank you for reaching out to us.
According to handbookgermany: https://handbookgermany.de/en/rights-laws/asylum/asylum-disability.html:
In general, you cannot obtain a permanent residence permit as long as you depend on financial help from the Social Welfare Office. However, disability can be considered as a reason for exemption: if your disability is the reason why you cannot work, you can still obtain a permanent residence permit. However, you must be able to prove your inability to work with medical certificates.
I hope my answer helps.
Best wishes
Julia
P.S.: I saw that you opened another thread with similar content. In order to keep a better overview and information in one place I will close the other one. I hope it's okay for you. Please don't hesitate to get back to us with further questions on your situation.