Do you custom a form for your SP list using PowerApps?
Do you want to detect in the app from which view on the SP list it was launched from?
If you want to detect in the app from which view on the SP list it was launched from, I afraid that there is no way to achieve your needs in PowerApps currently.
Actually, the creation of the custom form (created via PowerApps) of a SP list is not related to which view it is in your SP list. No matter which view your app loads from, the custom form would display same fields which you enabled within the Edit form (SharePointForm1) of your app.
If you would like this feature to be added in PowerApps, please consider submit an idea to PowerApps Ideas Forum: