What If Parameter

I want to be able to setup a parameter where the user enters a number which is then used in measure calculations etc. I see that there is supposed to be a feature called a "What-If Parameter" but I am unable to find it, it is not located where the documentation says to go. Only my Modeling Menu I do not have this feature, see attached screen grab.

Use what-if parameters to visualize variables - Power BI | Microsoft Docs

Verion info

Release:
April 2021

Product Version:
2.92.943.0 (21.04) (x64)

OS Version:
Microsoft Windows NT 10.0.19042.0 (x64 en-US)

CLR Version:
4.7 or later [Release Number = 528372]