Scale Mode Parameter, Dynamic Atlas Settings, and Clear Settings dropdowns are missing the Panel Settings Asset Preset, Refer attached screenshot.

Steps to repro:
1. Create a new project.
2. Project > Create > UI Toolkit > Panel Settings Asset
3. Create Panel Settings asset prest

Actual Result:
Scale Mode Parameter, Dynamic Atlas Settings, and Clear Settings dropdowns are missing in the preset of Panel Settings Asset

Expected Result:
Scale, Dynamic, and Clear Settings dropdowns should be available in the Preset of Panel Settings Asset

Note: Panel Settings Asset is introduced in Unity 2021.2.0a4

Reproducible in:
2021.2.0a14, 2021.2.0a4

Environment:
Windows10 and macOS 10.15