Can not set Spam / Junk folder in iOS 15
My mail provider has a spam junk folder named 'spam'. this is where they drop off spam according and I can set online rules for mail to be labelled spam.
In mail on Mac you can select this folder as the "junk" mail folder and the Mac will drop the spam mail in that folder.
On iOS this option is missing for me in iOS 15. I think I used to have that option (not sure anymore now) and online it seems to be the case that you can select is in the settings > mail > accounts > advanced. But this is not the case. Neither iOS nor iPadOS
Is there any way where you can select a junk folder on iOS with an IMAP mailbox (not iCloud).
Right now I have 2 spam boxes.
iPhone 13 Pro