I am a fan of adding links in both directions in cases where neither note is more important.
For example, when iterating links amongst each other in a pool of source idea fragments that will be assembled into more sophisticated ideas, I like to get the back links in place immediately as they help trigger new links and give the freedom of ping ponging around while only focusing on the note content.
Using arrows in the graph and turning repel forces up and center and link forces down can be helpful to try to double check for any backlinks you forgot to add.
You can also go the plugin route, where this process appears to be automated. I recently made these requests: Auto link B—>A after A—>B link creation and Auto add links of all open notes to all open notes
Good question. I was curious about this as well. Thanks.