The binary thinking you suggest is problematic. One will not be condemned to everlasting Hell simply for not solving "the Pope problem," i.e. for simply professing abstractly that Leo is "the Holy Father."
But who the Pope is has consequences downstream in the realm of faith and morals in the actions of individual Catholics. If you think Leo is the Pope and he says all religions lead to God and ɧoɱosɛҳųαƖ relationships can be blessed, then you have a conundrum. You say, "well I don't personally believe that" while at the same time saying that the guy who does say that is the Vicar of Christ on earth.
Do you not see any logical contradiction? You are signaling to all who know you that you don't really think it matters if we have "differences of opinion" on these issues of faith and morals. We are all one big Catholic family under the big tent of synodality. Sure we have disagreements but "can't we all just get along." That is a form of indifferentism. And it is the stated goal of the Freemasonic project.
Do you think that is what Jesus taught? Following Him, we are to testify to the Truth even if it causes us to suffer death. We are not to compromise and prop up corrupt, false authorities who claim to speak in the name of Jesus while contradicting Him. That is to cause scandal, and the theologians call it cooperation with evil, a sin against charity.
So, will those Catholics who cooperate materially with evil be damned to Hell eternally. I don't think so. But they probably won't go straight to Heaven if they have failed to understand one of the fundamental lessons that Jesus taught. Purgatory is not a desirable destination according to the Saints. We should seek to be pleasing to God in all our thoughts, words and deeds. If we do so, and take advantage of the graces supplied by the Church's Sacraments and indulgences, then we have a chance to merit the beatific vision immediately.
How then do we avoid Purgatory? We are, first, to love God with all our mind, soul and strength and, second, to love our neighbor as ourselves. Primarily this consists in keeping the Ten Commandments and striving to avoid even venial sins.
But do we show our love for God when we call someone the Vicar of Christ who contradicts the teachings of Jesus Himself? Do we show our love for our neighbor when we tell other Catholics they must recognize a false prophet as the Pope (or else they will be outside of the Church where there is no salvation)?
The answer, of course, is no. Doing those things we reveal our lukewarmness. To the lukewarm in Apocalypse 3:19, Jesus says "Be zealous therefore, and do penance." Those who cooperate with evil out of laziness or convenience are not practicing zeal. And a person who thinks they are a traditional Catholic, in these times, must be zealous to keep their faith alive.
A zealous Catholic does not call a heretic "the Holy Father."
My 2 cents is that at the end of the day the modern situation is not like the Anglican schism that was totally transparent, it's more like the Western Schism where your average fella was like "I really don't know what's going on man I'm just trying my best to be a good Catholic and get to heaven"
People that go to the FSSP or SSPX or CMRI usually aren't just your typical cultural Catholics going to the nearest church to tick a box, they're clearly thinking about these things and trying their best to do the will of God in good faith.
I'm not a sede myself but I know most sedes are sedes out of a sense of wanting to do the will of God, have valid sacraments and because they believe that's what the Church has taught regarding
ipso facto loss of office. I see how someone can reach that position in good faith.
R&R are R&R so out of a sense of wanting to do the will of God,
have valid sacraments, remain united to Christ's Church, and because they believe that sedevacantism contradicts the Four Marks of the Church.
I'm certainly not worried about the salvation of either solely on account of their position. Jesus knows that that we live in an upside down clown world and it's all very confusing and weird.
Maybe this reads as relativism or contradicting EENS but does anyone think that when a random miller that died during the Western Schism came to judgement God said "You were a good Catholic and all but sorry, pal, you followed Pope Luna, so no Paradise for you", we know for a fact that that's not the case because we honour multiple saints who followed the antipopes, most namely St. Vicent Ferrer and St. Colette.
In a similar way, if someone has done their best to reach the truth of the matter on this, but they turned out to be wrong, I feel like if they were good Catholic God will say something like "Eh, these things happen, I did choose some confusing times for you to live in, come right in after your purgatory"