A cursory reading of the difference between the Roman rite and the Orthodox shows otherwise.
https://christianityfaq.com/roman-catholicism-eastern-orthodoxy-comparison/
One of the major ones is the rejection of the papacy by the Orthodox, which according to Catholic doctrine, means they are not saved.
Unam Sanctum, an infallible pronouncement by Pope demands subjection to the Roman Pontiff as a requirement for salvation.
Unam Sanctam
One God, One Faith, One Spiritual Authority
Pope Boniface VIII - 1302
https://www.papalencyclicals.net/bon08/b8unam.htm
Quote: “ Furthermore, we declare, we proclaim, we define that it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff.”
Which, BTW is another point where Roman Catholic doctrine veers from Scriptural teaching. NOWHERE in Scripture are people commanded to submit to either Peter or the church at Rome.