Dear Atharva Deshpande,
Thank you for your reply.
As of January 2025, the Quick Parts feature is not available in the new Outlook for Windows. Microsoft has acknowledged this and is actively developing the new Outlook experience. While specific timelines for reintroducing Quick Parts haven't been announced, Microsoft encourages users to provide feedback through the Microsoft Feedback Portal. This input helps prioritize feature development based on user demand.
Please note new Outlook is still in active development, with more features still in the works. To check for upcoming features you can check Microsoft 365 Roadmap | Microsoft 365.
In the meantime, if Quick Parts is essential to your workflow, you might consider continuing with the classic desktop version of Outlook, which Microsoft has committed to supporting until at least 2029. This ensures access to all current features, including Quick Parts, while the new Outlook continues to evolve.
Thank you for your time and understanding. For other questions, feel free to add your post to the Microsoft Community team.
Best Regards,
Community Moderator.