If you have individual uploads for each platform then you can see the total number of downloads per platform from the table on your analytics page.
Viewing post in Running an indie game store comments
thanks for the answer!
By "individual uploads" do you mean different listings?
so https://colingamagami.itch.io/closeyoureyes would see the different plattforms and https://jonahdlovell.itch.io/the-town-of-beacon wouldn't?