You can check which version of ArcGIS Pro the latest Discover addin supports on the downloads page here. 

As Discover is an addin to ArcGIS Pro the system requirements are the same as ArcGIS Pro these can be found at the below link -

https://pro.arcgis.com/en/pro-app/latest/get-started/arcgis-pro-system-requirements.htm

Software Requirements

The Discover addin will attempt to install the following during its installation process.

In addition ArcGIS Pro requires the Microsoft Access Engine 2016 to open Excel/Access files. This maybe the x86/32bit or x64/64bit version -

https://pro.arcgis.com/en/pro-app/latest/help/data/excel/work-with-excel-in-arcgis-pro.htm

Discover also requires -

Microsoft Access Engine 2016 x64 (64bit), regardless of the office version.

Microsoft C++ 2015-2021 x64 (64bit).