Hi, guys!
TLDR: Using Sharepoint PowerApps forms to display list items, also setting item-level permission through a power automate flow. By design I do not want users to have Sharepoint-site access to the lists itself and only item-level. When they navigate to the specific item (which is granted by item-level permission through Power Automate), they get an error when the forms app is loaded: "This app isn’t opening correctly It looks like you don’t have access to this app. Ask its owner to share it with you".
Background (details below of what we want to achieve):
I've created a Sharepoint list ('Oppgaver') forms where we are mimicking a to-do list for a group of people.
The idea behind this is that the manager(delegator) simply has full access to the whole list where this is his view (the only person that is a member of the specific site):

And the rest of the users (task-handlers) will only be able to see their items (item-level permission) as long as they have been assigned to the person-column "Ansvarlig".
This means that whenever a task-handler tries to open the link and navigates out of the item and to the manager-restricted list itself, they will only see their own assigned/permitted items only:


So far so good, but as soon as we activate the PowerApps forms it seems that the app's permission settings are inherited by the list/site-permission rather than item-level permission set by the Power Automate delegation-flow; they get this error during PowerApps load:

Are there any workaround to make the PowerApps forms not inheriting the permissions based on the Sharepoint list, but instead be based off the list-item permission set by the existing Power Automate flow trigger?
Suggestions, links and articles are greatly appreciated to guide me!
Br, Ga Kin
Edit: Changed title to reflect the specific issue with Sharepoint forms item-level permissions including a Power App.