Went on a bit of a walkabout in Katong, checking out some of the malls + shops, and filled out some gaps in OpenStreetMap:

https://www.openstreetmap.org/changeset/120487686
https://www.openstreetmap.org/changeset/120488288
https://www.openstreetmap.org/changeset/120488650
https://www.openstreetmap.org/changeset/120489348
https://www.openstreetmap.org/changeset/120489836
https://www.openstreetmap.org/changeset/120491099

Satisfying to see mall buildings get filled in with POIs, even if I can't exactly guarantee their precision (GPS is fiddly), at least the tenants' presence is made known