Flow button in Modern Document Library Web Part

I followed the same Microsoft Docs yesterday to add a Flow trigger button in a SharePoint list only to find that it doesn't work in web part - very disappointing.

I need to display the list in a page alongside instructions of how to add an item, then send a summary of that item via email (Flow). It's awkward to explain to end users that they can do most of the features from inside a page but then have to go into the list to trigger the button. I will add the same info to the uservoice.