Apparently there are mythical Sedevacantist Carthusians in Europe. There is no information that I’ve seen apart from one post on CI. Maybe ask a European Sedevacantist priest. I’d say France but it could be further East. There poster said that the whole point is that only people who really desire to join will find it.
There is Bishop Vezelis OFM group in the Eastern US. They don’t accept Lefebvre’s ordination or consecration. They have a website but I can’t remember the name of it. (Sede)
There is a group of Sedevacantist Carmelite Friars in either France or the US. They might be somewhere else but I doubt it. There’s only one YouTube video I’ve seen about them. They have a channel but they only posted one video about the Carmelite rite.
Additionally the CMRI has Fr Francis Miller OFM and I’m pretty sure they have a Benedictine also.
For the resistance ones:
I seem to remember some Benedictines in Columbia from Bp Thomas Aquinas’s monastery. Although I am probably wrong.
There are two Benedictine monasteries in Brazil. I think one is SSPX and you probably mentioned them, I just don’t know their name.
If anyone has any other details on the ones I’ve mentioned please send me a PM. Also this my first real post. I’ve been a bit of a lurker on here for the past 6 months.