They do. It took another council to sort through the claims then and it will do so again. The blatant nature required is not there. And i believe they rely on their proxies to implement the heresies and are complicit to it rather than outing themselves directly . Whether it’s bad theology or by nefarious motives is yet to be determined.
There is no equivalent between the non-heretical claimants to the papacy during the Western Schism and the heretic "popes" now.
The principles of Catholic teaching are outlined above, you need to show/demonstrate why those principles do not apply now, but then explain why they were true then (even without a council's definition or a public declaration of heresy).
But following these teachings will not make your transition in Knoxville easier, contrarily it would make your sacrifices even more difficult because it is not as easy to find Masses that are said NOT in communion with Prevost, therefore bias favoring one's own position is a likely factor in anyone's mind who has "something to lose". It would not be a love the truth that motivates the search, but rather the need to be justified in one's current position and actions. Contrarily, maybe you are having a personal crisis for a reason, and it has nothing to do with your ability or inability to get to Rome "approved" Masses, but rather God may be leading you out into the desert to teach you some things. Prayer is the most powerful and necessary means of saving ones's soul. You can have Masses, Confession, and wonderful community everyday, but if you don't actually pray then those things will not help you. If you don't listen to God about what is happening now, those things won't help you. Many people just want to stay "time-locked" in 1961, but that is not Catholic to think that way. Things change, circuмstances affect us, evil evolves, grows and spreads, and grace is still available to you no matter what situation you are in - do not give up your faith or hope. You only compromise yourself when you declare to God that you are with the heretics (at least that is the principle that is laid out above in the AI chat).