Hi,
Thank you for writing to Microsoft Community Forums.
I understand that you want to hide the mouse cursor while recording using Game bar. I would like to inform you that the mouse cursor will appear depending on the application that you are using when recording.
However, it would be great if you can share your feedback and suggestions in the Microsoft Feedback Hub, where our developers can look into the requests and constantly improve the features.
Regards,
Nikhar Khare
Microsoft Community - Moderator