Here, the women gather together and perform Salat-ul-Tasbeeh (congregationally). One of them would recite loudly and the others would recite softly. Is this correct? Furthermore, will Salah be valid?
It is not correct as per Shari’ah to perform Salat-ul-Tasbeeh in the mention method. Furthermore, performing Nafl Salah congregationally and the Salah lead by a woman are both Makruh Tahreem and must be avoided.