MRTK Figma Toolkit provides 2D versions of the HoloLens 2 style UI controls that you can find in the MRTK for Unity or MRTK for Unreal. You can use this in the design process for creating UI layouts and storyboards.
How to use Figma Toolkit
Use Duplicate to your drafts menu to make a copy.
Click Back to files to see duplicated copy. You can use this copy for your own creation.
To download and work locally, use File > save local copy menu. Import downloaded file (.fig) into Figma using the Import button on the upper right corner.
You can use the Pages menus on the left to open different pages included in the file.
Open Introduction page to learn about how to use components and states.
UI Gallery & Components
UI Gallery and Components page show all available components for your design.
Using Assets tab, you can browse these components and drag into your page.
Figma Toolkit could be useful to sketch menu UI.
Assets could be used for storyboarding.