لماذا لا تعتر الراء المفخمة حرف فرعي

The emphasized Alif and Lam are considered as subsidiary letters because they are between two exits, unlike the Ra which is not considered a subsidiary letter because it only exits from one exit. The subsidiary letters are between two exits. The S, D, and T letters are emphasized after the Alif and Lam, making them emphasized and becoming the letters of the plates. As for the word of majesty, it is emphasized if it is followed by a Fatha or Dammah.