Missing folders in iOS Mail app

[#1]

As of today the only foldersnin the app are Inbox and Sent.
Is this a sign of the migration to the awful Greenby? 

[#2]

I think this might be a sign that the iOS mail app is dreadful.

For no apparent reason I found all my mail (from many different suppliers Outlook, GMail & the rest) had been moved to "junk" by the iOS mail app.

If you have a PC with outlook, have a look at your account on that.