Welcome back to the Wefugees Community and thank you for your question.
The issuing of the residence permit according to section 25 (5) of the German Residence Act lies at the discretion of the responsible immigration office (Ausländerbehörde). They will assess every application individually. Securing the livelihood yourself (which means being independent from social money) is not a requirement as such and the immigration office may issue the respective residence permit nevertheless. However, they will look at your current life in Germany as a whole and may also check your so-called "Integrationsleistungen" so far and how well you are integrated into the German labour market. In sum, it is definetely a plus if you are able to cover all your costs of living and if you are working. For further information you may check the website of the Refugee Council in Lower Saxony, for instance (in German though).
Would you agree dear @mbeon-fardeen or is there anything you would like to add?
I hope this helps and please don't hesitate to get back to us with any further questions.
All the best,