When an enrichment isn't running, you have a few options:
1. Double-click on the row and if it shows "waiting for its inputs, " click "re-run this cell."
2. Toggle the auto-update off and on again, then accept the run prompt to update all rows.
3. For email waterfalls specifically, you can click, drag, and select multiple rows, then right-click and select "Run # of cells" or click the play button in the column header of the first data provider.