PowerBIIntegration.Refresh() is now available for new PowerApps to refresh the Power BI dataset, but this doesn't work for existing PowerApps. Please add a 'refresh' option to refresh the methods of PowerBIIntegration.
It's a functionality dat Microsoft only adds for new PowerApps. The functionallity cannot be added to existing PowerApps. That is a pity if you already have a bunch of exiting PowerApps that are connecting to Power BI data.
PowerBIIntegration.Refresh() is now available for new PowerApps to refresh the Power BI dataset, but this doesn't work for existing PowerApps. Please add a 'refresh' option to refresh the methods of PowerBIIntegration.
I can confirm the very same scenario - which lakVenkat mentioned earlier- happened to me this morning (October 6, 2019). I must also point out that - like lakVenkat - I didn't use any existing app, but created a brand new blank Form "all from scratch" which I could later integrate in Power BI report to grab user data inputs. Power BI Desktop content is connected to very same PowerApps Azure SQL Server defined database in DirectQuery mode. Adding PowerBIIntegration.Refresh(); in PowerApps code doesn't seem to be supported at this stage and displays same unknown or unsupported function error. (sigh...). Any updated information would be appreciated. Thank you.