Login issues throughout apps and browsers

Hi pdx93,

We appreciate you reaching out to us.

We’d like to gather additional details that may help us be in a better position to assist you.

1. Does it help if you restart your iPhone? Restart your iPhone - Apple Support
2. Also, do you have a different Apple device that is signed in to the same Apple ID? If yes, are you experiencing a similar issue with your other device? These details can help us in isolating the issue.

In the meantime, let’s check for a software update and make sure that you are running the latest version of iOS.

While it isn't inherently assured that an update will resolve the issue, updating to the latest software version for your device can help isolate potential software issues. 

Kindly secure a backup and update.

1. How to back up your iPhone, iPad, and iPod touch
2. Update your iPhone, iPad, or iPod touch

If iCloud Keychain is enabled on your iPhone, but Safari won't autofill your account information, the steps below may help.

• "For account names and passwords: Go to Settings > Passwords > Password Options. Then check that AutoFill Passwords is turned on.
• For credit card information: Go to Settings > Safari > Autofill. Check that Credit Cards is turned on.
• Turn off Private Browsing: Open Safari. If the navigation bar in Safari is black or dark instead of white or light gray, turn off Private Browsing. Safari doesn't save account names and passwords when Private Browsing is on."

You can use the article below as a reference.

If iCloud Keychain won't turn on or sync - Apple Support

Take care!