I’m using the Simple Tables app and grouping doesn’t appear. What am I missing?

[Laura G_ – RedFox Ventures]

Hi everyone! I’m using the Simple Tables app in Confluence Cloud. I add a grouping on a column (Columns → Pick the column → Grouping → Add Mode type) and hit Save, but the table still looks flat — no expandable group headers. What could I be doing wrong? How should it look when grouping is correctly enabled?

Thanks