Were you editing the note for less than 5 minutes? Or was your File Recovery settings set to a longer interval?
Google Drive may have a version snapshot history. I see it referenced in websites, but I can’t find the feature myself, in my own drive. That link shows “Manage versions” when you right-click on a file. I don’t seem to have that feature for some reason. But you might find it that way.
I encourage you to keep backups, and don’t rely on “sync” services to be your only source of backups or version control.
This article describes why Google Drive should not be considered a true backup solution: Google Backup and Sync: Is It Really Backup? | Spanning
Sorry that you lost data.