Hallo,
wenn ich eine Mail lösche wird sie nicht in dem Papierkorb gelistet.
If i delete a Mail i cannot see them in the trash/wastepaper basket.
Welcome here, @miru .
I suggest you go to “Hamburger menu (top left) / Settings / (account) / Folders” and make sure that the folders are properly set up. Unfortunately it is possible that a special folder is not mapped to an actual folder… Double check!