Power BI App Custom page size not fitting

Hi Anonymous 

You’ve published a report with a custom canvas size to a Power BI App, and while it displays correctly in the Power BI Service, it appears zoomed in when opened through the App. This happens because Power BI Apps don’t automatically scale non-standard page sizes, so custom layouts can lose proper fit and responsiveness. Although Microsoft recommends switching to a standard page size for best viewing, that isn’t practical in your case due to the complex design. You're currently testing to see if there’s a workaround that preserves the custom layout without needing to rebuild the report, since the issue seems tied to how the App handles custom page dimensions rather than a report problem.