Login error with Facebook app on iPhone 13

sounds like something you should ask Facebook support about..

maybe one of these will help..

https://www.facebook.com/help/

How to contact an app developer - Apple Support

TYMILKAY Said:

"Facebook App: I cant log into this app on my iphone 13. Keeps giving me a Login Error. Very frustrating."

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Remove/Add App:

Remove the App, and then download it again form the App Store. Perhaps it has become corrupt, somehow?

Contact Facebook for issues with their service and apps

Its not a fb thing I am having the same issue, I can log in on other phones but not mine no one can sign into the fb app on my phone ive done all the resets, deletes etc and nothing works