New Columns: Directories / Tags / Folders / Locations

Hello everyone,
Does anyone know how to add a column where I can see what the location of the emails is?

My email is based on Google Workspace, so I don’t know what happens or how google managed it when I add a dir or a subdir, but then if I open the ALL MAIL directory and filter them for UNREAD, I cannot understand if the emails are already in the right dir or not. So I tried to add new columns like TAG or LOCATION, but they don’t work.

I used to open a dir for each client, and I collect all the emails through automatic rules or manually to have them straight in the right place.

But sometimes, rules cannot work for every case, or they can even misplace the email. So I would like to have this kind of column to see where the email is.

Thanks for you help.

Cheers,
S.