Wrong.
So address the Theological Proofs given in the Article: https://onepeterfive.com/sedevacantists-church-without-pope/
Another objection: Would papal jurisdiction be supplied to the “heretic anti-pope (HAP) for his appointments?” Not so. For cuм Ex – the one docuмent on a heretical pontiff in Church history, which the earlier sedevacantists especially appealed to — explicitly says that those “appointed” by a heretic lack all authority. Those apparently “appointed” by heretics are not appointed at all [1]....
[1] cuм Ex Apostolatus Officio: “[E[ach and all of their words, deeds, actions and enactments, howsoever made, and anything whatsoever to which these may give rise, shall be without force and shall grant no stability whatsoever nor any right to anyone[.]”