No. In Jainism, Adinath (Rishabhanatha) is the first Tirthankara, a liberated soul who preached the Jain path. He is not considered an avatar or incarnation of Vishnu. The idea of Vishnu avatars belongs to Hindu tradition and is not part of Jain theology. In Jainism, the Tirthankaras are revered as enlightened beings who show the path to liberation, not as avatars of other gods.