FYI, addr:city and addr:postcode are preferably *not* added to addresses.

Existing boundary relations and postal_code relations already compute them automatically.  Flanders and Brussels are among the places of Europe with full automated postal code coverage.
Example here: https://www.openstreetmap.org/relation/3479696 ← Everything within this area is automatically recognized as having addr:postcode=3080.

This will also reduce the risk for typos or mistakes and keeps the database light and clean.

Hope this helps.