It would be very useful to be able to add a note when restoring a backup, for example, when you need to restore several backups and not get confused between them.
This function already exists. You can edit the notes template for each backed up VM/Container at your will. Then, within the name, you have a NOTES section where you have exactly what you are looking for.
This function already exists. You can edit the notes template for each backed up VM/Container at your will. Then, within the name, you have a NOTES section where you have exactly what you are looking for.
Notes are created for each copy during backup, but they aren't displayed or visible after restoration because the backup restores the VM/CT in its original state.
The whole point is to create a new note during restoration.
You highlighted two different types of notes. One are notes for backups, the other one are notes bound to VM/LXC which are storaged at the top of your VM/LXC configuration file prefixed with "###" for each line.