If there is support of her in the pews, they can vote to leave. They could join another denomination or start their own.
The Fort Worth, Texas episcopal diocese voted by a two thirds margin to join the conservative African Episcopal church union a few years ago. A number of individual churches voted to change association, too, but Fort Worth was the only entire diocese.
If her members voted, they could choose to become liberal Lutheran, Episcopalian or something else.
They are unlikely to do this; they undoubtedly want to split the church, forcing the “old guard” to leave, keeping the church property and the name.