Tooltips are missing for the following properties under Rule, Hexagonal, Isometric Tile in the Inspector:
- Tile
- Default Sprite
- Default GameObject
- Default Collider
- Tilling Rule: GameObject, Collider, Output
Refer attached video

Steps to repro:
1. Create a new project with a 2D Template
2. Window > Package Manager > 2D Tilemap Extras > Install
3. Project > Create > 2D > Tiles > Rule, Hexagonal, Isometric, Override Tile
4. Hover mouse on all properties

Actual Result:
Tooltips are missing

Expected Result:
Tooltip appears when the mouse has hovered on the properties

Note: Rule, Isometric, Hexagonal, Override Tiles are introduced in the Unity 2021.2.0a6

Reproducible in:
2021.2.0a16, 2021.2.0a6

Environment:
Occurring on Windows 10 & macOS 10.15.