Passwords have disappeared from my iPhone settings menu

Hello all. Recently I tried to sign into something on my iPhone and noticed the password settings menu item is gone. Searching on the issue told me to try the following:

1. turn off and on Sync this iPhone from the (account name) > iCloud > Passwords menu. result: nada
2. restart iPhone. result: nada
3. check iCloud account signed in on phone. result: signed in, no improvement.
4. iOS up to date: I updated it to the latest version of iOS (albeit it was already only one update behind). result: nada
5. checked my older iPhone I still keep synced to iCloud and have a cheap pre-paid account cell plan for. result: passwords accessible from this phone, only my new-er iPhone is missing passwords. no improvement.
6. one thing I noticed is much of the settings menu is gone from my problem iPhone (see attachments). My older phone has a long list of apps and other items missing from my new-er iPhone in addition to the passwords.
7. passwords are fully accessible from my MacBook Pro's settings.

two iPhone menus: https://imgur.com/a/Y1lrQx0