The 'All Junk' folder

I have set up the ‘All Junk’ folder for my and my wife’s iCloud accounts. It is working and collecting both accounts junk email just fine. Now… can I delete (or hide) our individual Junk folders? Thank you!

No. The All Junk mailbox is like a smart mailbox that shows the contents of the actual Junk mailboxes, so you can’t delete them.