Navigate to a custom list

Click on Automate in the Task Bar

From the dropdown list select Power Automate

In the submenu click See your flows

Select a Flow you wish to share by placing a tick in the left hand column

Click on the ellipsis (...) in the Task Bar

Select Details from the dropdown menu

To add a new owner or run-only user to the flow click Edit on the Owners or Run-only users card as required at the right of the window.

Start typing an entry in the Enter names, Email addresses, or Other Groups box

Select an entry from the dropdown list or add an email address for a guest external user

If you added a new owner, to exit select the left arrow next to the Flow name at the top of the window.

If you added a new Run-only user, to save your changes click Save at the foot of the pane