Add a keyboard shortcut to trigger the note preview popup when a note is selected (or the cursor is on a link).
This is particularly useful in File Explorer.
A good candite would be ctrl\cmd or even nothing (automatically open the preview).
The selection should be handled in Page Preview plugin options along with the others.
I’d also be interested in this feature. One of the things I like about Obsidian is how easy it is to navigate with out a mouse, but I haven’t yet found a way to see the preview popup without it.