Power Apps gallery shows no data — how to fix it
An empty Power Apps gallery is almost always a data, filter, or refresh problem — not a broken template. First check the gallery’s Items property: if it points to a collection, confirm the ClearCollect in OnVisible or OnStart actually ran; if Items is a Filter() returning nothing, temporarily set Items to the raw data source to confirm the data exists at all. Other common causes: a filter comparing mismatched types (text vs number) or a blank variable, a delegation limit silently dropping expected rows, or a data source that needs Refresh() after a Patch or external change. To diagnose fast, add a temporary label with Text = CountRows(YourGalleryItems) — zero rows means the query is the problem, not the gallery template.
Check the Items property first
Select the gallery and read its Items property. If it points to a collection, confirm the collection was actually filled (ClearCollect in OnVisible/OnStart ran).
If Items is a Filter() returning nothing, temporarily set Items to the raw data source to confirm data exists.
Common causes
- 1The OnVisible/OnStart that builds the collection never ran — navigate away and back, or check App.OnStart.
- 2A filter condition is too strict or compares mismatched types (text vs number, or a blank variable).
- 3A delegation limit silently dropped the rows you expected (see the delegation guide).
- 4The data source needs a Refresh() after a Patch or external change.
Quick diagnosis
Add a temporary label with Text = CountRows(YourGalleryItems) to see how many rows the gallery is really getting. Zero means the query, not the template, is the problem.