It used to be there, 2007-2012 https://archive.org/details/safari-5.1.7-windows

I found an announcement in Italian on Apple website. It's from June 2007 https://www.apple.com/it/newsroom/2007/06/11Apple-Introduces...

The original plan with the iPhone was to have web apps, not native apps. That's why they needed to run the rendering engine of the iPhone on Windows. Then they went native and Mac only with the dev environment.

I don't think that Apple would earn one single dollar by porting Safari to Windows again.