Request you to please confirm whether can we read Salatut Tunajina and please confirm its existence.
بسم الله الرحمن الرحيم
(Fatwa: 204/162/B=2/1439)
There is no salah mentioned in Hadith in the name of Salah al-Tunjina. Yes, we do find the name of Salah Tahiyatul Masjid and Tahiyatul Wudhu likewise Salah al-Taubah and Salah al-Hajah also find mention in Hadith. If you mean durood tunjina then it too is not proved from the Hadith. However, its words and meanings are correct hence one can read durood tunjina.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband