i downloaded the granny speedrun mod 1.3.1, and extracted it but i cant find the granny data

Granny v1.3.1 doesn't have a Granny_Data folder. I think you're reading the installation tutorial for the v1.2.1 mod

You need to copy the files into the same folder where your Granny exe is. And make sure you download the v1.3.1 mod

The v1.3.1 mod download and how to install it can be found here https://www.speedrun.com/granny_pc/resources/0wexn

Although, I think the installation and the difference between these mods need to be made more clear.