If Mystra begins to be worshipped in another world (another setting), does she creates a Weave there as well/bonds with the existing “magic system” in place?

@TheEdVerse hi, how you been? Hope you are recovering well.
I have a question: if Mystra begins to be worshipped in another world (another setting), does she creates a Weave there as well/bonds with the existing "magic system" in place? Or does she has a handicap in that world?

— Jon Gomez (@ZeromaruX) October 1, 2019

1)
She has a handicap in that world, unless or until a HUGE number of its arcane-magic-wielding inhabitants worship her. She would work through the world’s existing magic system, and if it’s not “arcane” (=cast magic spells 2)
…might never be able to do more than send warning/advice mind-visions and messages to those who think of her.#Realmslore

— Ed Greenwood (@TheEdVerse) October 1, 2019