System Information
Operating system: Windows 10
Graphics card: 280 GTX

Blender Version
2.92.0 Beta Date 2021-01-13

Short description of error
When starting from a fresh factory restart:

1. There is no Undo function

2. There is no two-click object creation

I have activated developer extras and Experimental section. But there isn't a two-click creation there.

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).