If the Pope is claiming to accept a resignation that has never been tenured, it seems to me a case for Edward Peters.
Some one who would do such a thing makes Nixon on a bad day look good.
I’m not a canon lawyer, but I think I can say with confidence that a bishop can be deposed by the Pope for any reason or no reason, and that there is no recourse.
The reason, though, is despicable. The Pope squashed the FFI, and has been punishing bishops around the world for taking in any former members. The Pope wants them starving in the gutter, or, at best, working at Starbuck’s.
This putative Pope has spent almost four years squashing people like bugs. He is utterly lawless, and a rank fraud. Someone recently wrote that his public persona—jolly, humble—is the phoniest thing about him.