If you select the action of [Mobile Flow Button] connector as the trigger, "Execution Only User" will be displayed on the flow details screen.
So, you can choose to use the connection of the performer or use a fixed connection, but if you select the Power Apps button for the trigger, you could not select the connection.
As a result, Flow launches at the destination of the user who launched Power Apps, and the updater becomes the user who launched Power Apps.
I want to connect to the Flow creator, so even with Power Apps triggers. Improve the function so that the connection destination can be selected.