Lord Sri Caitanya Mahaprabhu is the Supreme Lord, and Nityananda Prabhu and Advaita Prabhu are manifestations of the Supreme Lord. All of Them are visnu-tattva, the Supreme, and are therefore worshipable by the living entities

Expressions researched:
"Lord Śrī Caitanya Mahāprabhu is the Supreme Lord, and Nityānanda Prabhu and Advaita Prabhu are manifestations of the Supreme Lord. All of Them are viṣṇu-tattva, the Supreme, and are therefore worshipable by the living entities"

Sri Caitanya-caritamrta

CC Adi-lila

Lord Śrī Caitanya Mahāprabhu is the Supreme Lord, and Nityānanda Prabhu and Advaita Prabhu are manifestations of the Supreme Lord. All of Them are viṣṇu-tattva, the Supreme, and are therefore worshipable by the living entities. Although the other two tattvas within the category of Pañca-tattva—namely, śakti-tattva and jīva-tattva, represented by Gadādhara and Śrīvāsa—are worshipers of the Supreme Lord, they are in the same category because they eternally engage in the transcendental loving service of the Lord.

CC Adi 7.15, Translation and Purport

The three predominators [Caitanya Mahāprabhu, Nityānanda Prabhu and Advaita Prabhu] are worshipable by all living entities, and the fourth principle [Śrī Gadādhara Prabhu] is to be understood as Their worshiper.

In his Anubhāṣya, Śrī Bhaktisiddhānta Sarasvatī Ṭhākura, describing the truth about the Pañca-tattva, explains that we should understand that Lord Śrī Caitanya Mahāprabhu is the supreme predominator and that Nityānanda Prabhu and Advaita Prabhu are His subordinates but are also predominators. Lord Śrī Caitanya Mahāprabhu is the Supreme Lord, and Nityānanda Prabhu and Advaita Prabhu are manifestations of the Supreme Lord. All of Them are viṣṇu-tattva, the Supreme, and are therefore worshipable by the living entities. Although the other two tattvas within the category of Pañca-tattva—namely, śakti-tattva and jīva-tattva, represented by Gadādhara and Śrīvāsa—are worshipers of the Supreme Lord, they are in the same category because they eternally engage in the transcendental loving service of the Lord.