Find who asked
Search your tickets and requests for people who raised it.
Lead with the news
Open with the feature name and that it is live now.
Remind them of their request
Mention what they asked for so the note feels personal.
Link to how to use it
Add a short help article or a screenshot.
Say what is not included
Be honest if it covers only part of what they asked.
Ask for feedback
Invite a reply and tell them it will be read.