Thanks for explaining — it sounds like your iPhone is stuck in a sync/authentication loop with iCloud, which could absolutely be preventing your Notes (or other data) from syncing or showing up. This is especially common after:
Downgrading iOSResetting devicesiCloud account sync interruptionsHere’s what you can do to try to resolve the stuck sync and potentially trigger recovery of your Notes:
Step-by-Step Fix for "Some of your iCloud data isn’t syncing"
1. Force Restart Your iPhone
Do this first to clear any temporary glitch:
iPhone 8 and later: Quickly press and release Volume Up → Quickly press and release Volume Down → Press and hold the Side button until the Apple logo appears.2. Sign Out and Back Into iCloud (If Possible)
This can reset the iCloud sync
Go to Settings > [Your Name] > Scroll down > Sign Out
Enter your Apple ID passwordRestart your iPhoneSign back in to iCloud from the same Settings pageLet your phone stay connected to Wi-Fi and plugged in after this.
3. Check System Status
Go to: Apple System Status
Look for iCloud Notes, Apple ID, and iCloud Account & Sign In. If anything is showing yellow/red, the issue may be on Apple’s side.
4. Reset Network Settings
Sometimes sync hangs due to network glitches:
Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network SettingsThis will remove sed Wi-Fi passwords but not your data5. Try Logging into iCloud on a Browser
Visit https://www.icloud.com from a computer or Safari:
Log in with your Apple IDTry accessing Notes from thereIf you’re prompted to verify your device or approve sign-in, do so — this may trigger the stalled connection to unfreeze6. Wait with the Device Plugged In
After any of these steps, let the iPhone sit on a reliable Wi-Fi connection, plugged into power, and unlocked, especially if syncing large amounts of data. It can sometimes take hours.
Bonus Option — Apple Support Tool
If all else fails, you can use Apple’s iCloud Recovery tools with a support agent:
Go to https://getsupport.apple.com and choose:
Apple ID → iCloud, FaceTime & Messages → iCloud data not syncing → Chat or CallExplain you’re stuck in sync and urgently need access to deleted Notes, and ask if there's a way to escalate a manual server-side recovery.