Display edges as boxes similar to nodes?

Hi!

I’m working on a little interactive text game and I thought it’d be neat to use obsidian canvas as a way to do all the writing. The idea is that each prompt would be a node and then each choice the player can make would be an edge.

This works mostly fine, but I would like to include a bunch of metadata in each edge, and so it would be better if it was possible to set up a border around each edge label and also make it display code tags and metadata fields. Would that be possible to configure in a custom css theme?