Jain Ramayan does not give Rama’s age in years the way many Hindu texts do. In Jain literature, Rama is treated as a Balabhadra (one of the Balapurusha) of the Ikshvaku dynasty and is placed in the Treta Yuga, far in the past, long before Mahavira. The focus is on his role as a revered being who follows non-violence and eventually attains nirvana in some traditions, rather than on a precise numerical age. Different Jain works (Paumachariya, Padmapurana, etc.) present Rama within the same general framework, though there are variations in details among Digambar and Śvetambar narrations. For example, Padmacaritra (Padma Purana) and Paumchariya describe Rama as Balabhadra and recount his life in a time long ago. You can read more here