If youre having trouble logging into your Facebook account from your Facebook app: Make sure that you have the latest version of the Facebook app, or delete the app and then reinstall it. Try logging in from a mobile browser (example: Safari, Chrome).

My phone is up to date, both apps are up to date. I have reset network settings, all settings, my entire phone, deleted and reinstalled the apps, basically everything. It was my iCloud account itself. I just fixed it last night on my own after talking to everyone possible for help.

I factory reset my phone. When logging back into my iPhone I chose not to restore from a previous backup on my iCloud account. And make sure you know all your passwords.

I use the keychain feature through apple so it saves my passwords for me. But all I did was back up all my things to iCloud.

Can't log into Facebook says that my password is wrong [Solved]

Wiped the phone and then chose not to restore. I hope that made sense and can help you!

Unfortunately you might end up developing the issue with multiple apps like me as well.