Is congregational prayer valid without the call to prayer (adhan)? May God grant you well-being.

Scholars have differed regarding the ruling on the Adhan (call to prayer), oscillating between it being Sunnah (recommended) and Wajib (obligatory). However, according to both opinions, the prayer of an individual (fadh) and a congregation (jama'ah) is valid without the Adhan. Ibn Qudamah said: "And if a worshiper prays without Adhan or Iqamah (second call to prayer), the prayer is valid according to both opinions."