Why is junk mail included with Mail Inboxes after Big Sur?

On my laptop which is still on Catalina, the combined 'Inboxes' section of Apple Mail only shows inboxes of the various accounts I have enabled. The unread badge also only counts unread mail from inboxes. The other mailboxes like Junk, Trash, Notes etc can be accessed by scrolling down and unfolding the corresponding mail account section.

On my iMac which is on Big Sur, the 'Inboxes' section of Apple Mail now includes all the other mailboxes and the unread messages in any mailbox including Junk/Spam/Trash are counted in the unread badge for that inbox. This negates any benefit of having a combined Inbox section and makes me believe I have a bunch of unread mail, when's its just Junk.

Is there any way to have mail all nice and neat and tidy and sensible like it was in Catalina?