I discovered the Watermelon VS Code extension yesterday.
What it does is give you the context of a piece of highlighted code by pulling in the comments from the associated pull request. Support for other platforms like JIRA are coming as well. Checkout the repository if you want to see how it all works.
The https://github.com/watermelontools/wm-extension repository on GitHubIt’s still early days, but it looks promising as an extension.