I am adding a button to a screen. Then in the OnSelect property, I click on Power Automate under the Action menu.
Adding Power Automate flow to OnSelect property
This provides a list of existing Flows in your environment that you want to call when clicking the button. This list does not display enough of the name and the full name is not shown in a hover over either.
Flow names are truncated due to length
And clicking the ellipsis only provide an Edit button..

If we had an experience similar for adding Flows like we do for adding other connectors or SQL tables, it would be much easier. Add by searching and the ability to refresh after the Flow was updated.
Working with PowerApps that call Flows in development (i.e flows are being changed) is very, very cumbersome. This is just one aspect. I'd love to see it get some attention.