Hi @Plinderoth ,
Do you want to share an app with flow?
Could you tell me whether the user is inside your organization?
You need to share these things:
1)share the app (in powerapps)
2)share the flow(in power automate)
3)share all the data sources that the app and the flow use
4)if you connect with cds, you also need to make the user have the permission of the entities that you use
But the environment, since after you share the app, the shared user could only view the app in its environment( it will not change environment), so you also need to give the user some permission about this environment.
What's more, if the user is an external user, you also need to invite him as a guest of your talent.
Here's a doc about this:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/share-app
If you insist not giving this user any permission of this environment, I suggest you consider export your app and flow. Then share him the exported files. Do not forget to give him access of the data sources.
Best regards,
