Hi @Zebk ,
Could you please share a bit more about your scenario?
Do you want to reset your Portal?
Currently, if you want to reset Portal, you need to go to PowerApps Portal Admin Center, click "Portal Actions", click the "Reset Portal" option to reset your Portal.
There is no other function or solution supported to reset a PowerApps Portal currently. If you would like this feature to be added in PowerApps, please submit an idea to PowerApps Ideas Forum:
https://powerusers.microsoft.com/t5/Power-Apps-Ideas/idb-p/PowerAppsIdeas
If you want the Portal to reflect the changes you made to it in real time, please consider re-edit your Portal, then click "Browse website" button in right corner to apply the changes you made to your Portal.
Best regards,