I think in reference to the parables Christ was speaking on specific things it was never a broad scope on Soteriology just a specific point or area he was showing us.
In the goats and the sheep he talks about the corporal works of mercy.
We know through our theology that good works are not meritorious unless they are performed for the right reasons and in the state of grace faith without works is dead.
One must be baptized in order to be in such state normally outside of Mary who was immaculately conceived.
The more agricultural parables deal with judgement which we all experience after death at the general judgement which comes before the final judgement at the end of time.
They also deal with living our Christian lives and being in a state of grace.
The good and bad are allowed to coexist with another but will be separated.
The Fatima prayer is from a private revelation which I figured was best to leave out of the OP since no one is required to put faith into any private revelation.
But if we do speak of private revelations I think it’s safe to say the bulk of them speak of eternal damnation.
Most of them deal with praying for people with a specific formula to give them the grace of a deathbed conversion or a conversion before their deaths.
If all religions were vehicles to salvation then I think many of us including myself would choose other Apostolic Churches to belong to without as many scandals or confusions.
That’s not to say the Orthodox Churches are perfect or that they don’t have scandals or confusions.
The Orthodox have more schisms than I can keep track of and it’s hard for people know what Churches are in communion with one another.
Being Catholic is not easy I could save myself a lot of grief and anxiety not being Catholic if the choosing was guaranteed that I would go to heaven regardless.
Alas I don’t believe that and have and will remain Catholic.
I also do not believe in Universalism, Dispensationalism, or that all religions are vehicles to salvation.
I agree other religions hold certain truths or truths that are universal to religion and philosophy.
I think in regards to the Orthodox Churches it is essentially the same religion as Catholicism particularly Eastern Catholicism aside from rejecting the Dogmas and the Papacy.
The difference being that Orthodox Christianity has all the sacraments and a valid priesthood but lacks communion with Rome and direction from the See of Peter whereas Protestantism only has baptism and some of the teachings which very innumerably.
Judaism has the basis of our faith but lacks the revelation of Jesus Christ, the Holy Trinity, and lacks the sacraments.
The other monotheistic religions grew out of heresies and Paganism usually tends to be relativistic and might occasionally have glimpses into the natural law.
Really it’s not the argument of is it possible people from other religions might be saved as we know this is hypothetically possible through invincible ignorance which is an extremely rare and precise circumstance.
The argument is whether or not Hell is empty?
I don’t believe Hell is presently empty or that it will be in the future as we all enter into eternity.