restore notes

Look under recently deleted

If it is not in Recently deleted folder then you have not deleted any Notes in last 30 days on iCloud or on "On My iPhone"

You may have moved it in other accounts (Folder).

• Check your email accounts that you had but removed. Because many of the accounts have notes synced like Google, iCloud, AOL, Exchange, Outlook, Yahoo etc.

You can't find it in the recently deleted folder, then probably you have not deleted any Notes in last 30 days.

(See the GIF below)

• ..

You may get better and prompt responses if you may kindly provide the iPhone Model that you have and the iOS version if it is known to you and re-post.