Notes disappeared on iPad after I turned on notes iCloud sync

Hello Vshasi,

This page here can help out with issues where the notes seem to be missing: If you're missing notes on your iPhone, iPad, or iPod touch - Apple Support

First, update all of your devices to the latest version of iOS, iPadOS, or macOS to make sure that the issue isn't related to previous software. Then try the following steps.

Check your account settings

If you store your notes with a third-party account or email service, like Gmail or Yahoo, check your settings:

1. In the Settings app, tap Mail.

2. Tap Accounts, then tap the email account that you want to check.

3. Make sure that Notes is on.

If you use Notes with more than one email account, just repeat the steps for each account. If your account is missing, learn how to add an email account to your device.

Check your Recently Deleted folder

If you store your notes on iCloud, check your Recently Deleted folder:

1. Open Notes, then tap the back icon  until you see your Folders list.

2. Tap Recently Deleted and search for your note.

If you find your note in Recently Deleted or in another folder, you can move it:

1. In the Notes list, tap Edit.

2. Select the note that you want to move.

3. Tap Move, then select the folder you want to move it to.

If you use notes with another service, like Gmail or Yahoo, check the Trash folder of that account in the Mail app. If you delete a note from the Notes app, your third-party account will usually keep it in the Trash folder. To recover a note from the Trash folder, you need to copy and paste the note to a new note in the Notes app.

If the notes were stored in a recent backup, you may also explore restoring from that: Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

Cheers.