I extensively use YAML frontmatter for tracking various data (e.g. contact information on persons). This is invisible in the preview (while hovering over a link).
Proposed solution
When hovering over a linked entry, I would like to have the option to see the frontmatter there.
Current workaround (optional)
Not using frontmatter
Opening the linked document in a new pane via CTRL+click
There is a much easier way I’ve found: frontmatter can also be given in the form of
keyA:: valueA…
keyB:: valueB…
instead of YAML frontmatter. This works for the dataview plugin and the preview, but won’t help you with YAML frontmatter commands like aliases. Still good enough for me.