Dear @Azad003,
Welcome back to the Wefugees Community and thank you for your question.
Unfortunately, the general BAMF website is providing the correct information in this case. That means that only asylum applicants from Syria, Eritrea, Somalia and Afghanistan can enroll in a so-called "Integration Course" already during the pending asylum procedure (if their case is not considered as Dublin case). I double-checked with this overview by the GGUA.
Sorry that I can not provide more positive information here. I really hope that you find alternative ways to study the language in the meantime. Otherwise, please also don't hesitate to get back to us on this or with any further question.
All the best,
Meike