Will factory resting on of my Iphones delete all my progress on an app on my other Iphone?

I started playing Marvle contest of champions on my old Iphone 4 but I recently received a gift of an Iphone 4s and transferred everything through Icloud. My question is my brother wants to buy my old Iphone 4 and factory reset it will that damage or delete my account on Marvle contest of champions on my new Iphone since my account was originally set up on my old Iphone?

No it wouldn't.

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