Good morning Krigan,
Welcome to the Apple Support Communities!
I understand you are having difficulties syncing passwords between your devices with iCloud Keychain. The resource below provides some troubleshooting steps for this issue:
Get help with iCloud Keychain
Make sure that your device is on a Wi-Fi or cellular network. If the connection appears strong, try these steps:
Turn off iCloud Keychain on all devices.
Turn on iCloud Keychain on the device that has the most up-to-date keychain items.
Turn on iCloud Keychain on your other devices. They will be updated with your new iCloud Keychain.
On your iPhone, iPad, or iPod touch with iOS 11 or later:
- Tap Settings > Accounts & Passwords > App & Website Passwords.
- Use Touch ID when you're prompted.
- Tap a website to view your password.
On your iPhone, iPad, or iPod touch with iOS 10.3 or earlier:
- Tap Settings > Safari > Passwords.
- Use Touch ID or enter your device passcode.
- Tap a website to view your password.
On your Mac with OS X Mavericks 10.9 or later:
- Choose Safari > Preferences, then click Passwords.
- Select a website to view your password.
- Select Show passwords for selected websites at the bottom of the window.
- Enter your Mac password.
Take care.