Hi LamSar ,

In Power BI Service,  tiles are the snapshot of your data, if original visualization used to create the tile changes, the tile doesn't change. After you republished the report, the change of report will not reflect to the dashboard tile. Please see: Dashboard tiles in Power BI.

To work around the issue, I would recommend you create a report with required visuals in one report page, and republish to service. Then "Pin a live page" to a dashboard, this feature allows changes to reports to appear in the dashboard tile when the report page is refreshed. Please refer: Pin an entire report page, as a live tile, to a Power BI dashboard.

And you could refer the following articles,and check if you with the same reason:

Dashboard Tiles doesn't refresh

Dashboards Tiles are not refreshing

Dashboard tiles are not refreshing

Best Regards

Lucien