There has to be a better way to trigger "for selected sharepoint item" flows than using the GUI, right? Can I trigger them by PowerShell? Or at least trigger them by the gui for multiple selected items?
For triggering a Flow on several selected items you will to develop a SPFx Extension...In regards of triggering from PS, what you could do is not just a trigger, you could poll the SPO list for new updates and then do what you want to do
