Hi there, i see your requirements i can implement Apple signin Button for you
i have an extensive amount of experience in react native .
i have built many Apps in react native and many of them are live on App store and play store as well.
i will provide you a premium quality code which will be easy to maintain and code will be readable as well.
i will provide you full time quick response if there is any query from you.
Looking forward to hear from you.
Cheers,
Annexure Solution