Hi,
I am not able to add a Flow in my List PowerApps form if the Flow is not created by me and I am only co-owner of it. Below is the Screenshot of the error message that I am getting:

Flow Trigger action used is as follows:

Note: If I remove the actions (from flow) which consumes connections to the SharePoint then it is working fine. My flow has only 6 actions. From the creator account, everything is working fine and flow easily gets added in PowerApps.