I can't edit my comment, so here's some screenshots to demonstrate what I mean:

The main discussion point in a work item: https://www.visualstudio.com/en-us/docs/work/backlogs/add-wo...

Hyperlinking: https://www.visualstudio.com/en-us/docs/work/backlogs/add-wo...

Example of a discussion in pull requests: https://www.visualstudio.com/en-us/docs/work/productivity/pr...