I would like to replicate a feature of Atlassian's own request form by providing our users more context for what the different levels of priority mean.
You can see the Atlassian form here https://support.atlassian.com/contact/ (select Technical Issues and then Service Management to see it).
Default appearance

The dropdown after being clicked

I have looked into creating this in a form but had no luck there either. Our priority levels have descriptions, but they are not surfaced anywhere for our users as far as I can tell.
Any ideas or alternative ideas are appreciated.