How do I download hw2 on windows?

I went to halo wars 2 on Microsoft.Com and didn’t see a download button. Can someone tell me the steps to get there in case I’m doing something wrong?

You should be able to find it by searching for Halo Wars 2 in the Store App. Alternatively you can find it in the web store here:
https://www.microsoft.com/en-us/store/p/halo-wars-2/c21tdxkrnmhz