Sedevacantists have no pope. However, it appears they have bishops? No Cardinals. Why no pope? Will they wait till...when? To have a Pope? The on going nonelection...just bishops?
Read more about sedevacantism. Most sedes view it as a safe course of action in times of major ecclesial disruption and apostasy.
We view it as reality that we have no control over (apart for praying that the Catholic Church gets a legitimate visible head again soon).
A public heretic cannot be Pope.
Bergi is a public heretic.
Therefore . . .
We will wait until we get one or until we die. We don't wait twiddling our thumbs and rolling our eyes but live a Catholic life and raise Catholic families and sanctify our souls and prepare for the most important moment of our lives, the moment of death when our eternity will be decided and fixed.