I just lost all my notes too, from my iPad, iPhone and my iMac. Any way to recover from TM?
EVP
Time Machine should be able to recover your Notes. On your Mac, go into your Mail Application. Selection the "Notes" tab in the left column first. Then, go into Time Machine; it will take a few moments for the time stamps to populate, choose a date or time that you know had all the notes you want to recover (from the "bars" you see on the right side of the screen) Select one, wait for the screen to fade to that date, and you should then see a list of all your missing notes. If you don't, keep going back in small increments until you see the list of all your missing notes. Once satisfied, hit the "Restore" button, and watch for the magical results.
Note: because your notes disappeared from all devices, I am assuming they wre synced via iCloud? Be sure to select the iCloud Notes, if that is the case. If you can't, then just create one new note,, and go from there.