What do you mean Bryce stans think Bryce is the Mother?
Nesta - not Bryce - has a connection with the Mother. Nesta - not Bryce - becomes the Mother. Nesta mentioned how the Mother looked out through her eyes - Bryce has never mentioned that. Nesta - not Bryce - is guided by the Mother. Nesta - not Bryce - had a full-blown conversation with the Mother. When Nesta first became the Mother, Cassian mentioned how their scents were similar yet wholly different.
Bryce is not the Mother, nor does she have the Mother's magic. Bryce herself acknowledged in HOFAS that Nesta became another being
Azriel didn't yield a single step. Nesta came to a stop before him. Nothing human or Fae looked out through the eyeholes of the mask.
Bryce may not have known who that being was, but those of us who have read ACOSF know that was the Mother. Kinda hard for Bryce to be the Mother when she's staring at the Mother via Nesta.
Nesta is the only character, canonically, who has a connection with the Mother. That's already established canon from both ACOSF and HOFAS.














