We don't have a public roadmap of our upcoming features for Start11 (or other products) but as it relates to StartX, much of it has to do with not what features can we build but what features can we support. The system tray is a perfect example as mid-cycle of Windows 11, Microsoft decided to rebuild it using XAML Islands which means we have to rework how Start11 functions.
We love the feedback that we get and the features our users want to see included in upcoming releases, I do keep an active backlog of features we are looking to implement in future versions. But until we have them built, stabilized, and ready for beta, we try not to share where we are headed to not set unrealistic expectations for the app.