Sola scriptura - the written scriptures alone. That’s the similarity with Sunni Islam. they hold to their version alone
You continue to display a lack of knowledge of Islam and Christianity.
The Sunni, in addition to the Koran, rely upon the Hadiths...man-made traditions of Muhammed.
The Shiites rely upon the Koran plus their ayatollahs (their priests).
In either case there is nothing in common with sola scriptura. The Islamic model is closer to that of Roman Catholicism.