Hello and welcome back to the Wefugees Community!
We discussed a so-called "Asylfolgeantrag" here before - please see my colleague's answer in this thread (as far as I know, the 3 months-rule is not valid anymore though).
Handbook Germany says:
"If there is new evidence regarding your persecution or new circumstances occur (e.g. a change of government in your home country), you can apply for asylum again, i.e. you can submit a subsequent asylum application or „Asylfolgeantrag “. You can also hand in a subsequent asylum application if you suffer from a severe war trauma which has remained undetected before, or in case you have a severe illness that is not curable in your country of origin."
I strongly to discuss this with a lawyer or at least with a refugee/migration counselling office. Without plausibility and good preparation, there is hardly a chance to succeed.
I hope this helps and please don't hesitate to get back to us with any further questions.
All the best,
Meike