Will the spatial audio feature on Airpods work on Android and Windows?

No.

What you need

• AirPods Pro
• iPhone 7 or later or one of these iPad models:
  • iPad Pro 12.9‑inch (3rd generation) and later
  • iPad Pro 11‑inch
  • iPad Air (3rd generation)
  • iPad (6th generation) and later
  • iPad mini (5th generation)
• iOS or iPadOS 14 or later
• Audiovisual content from a supported app

https://support.apple.com/en-us/HT211775

Yes there is a work around for windows called waves nx. There is a trail for 30 days for free. The way it works is that it uses a webcam to trach the movement if your head. So all you would need to do is connect your airpods or airpods pros to your pc/laptop like any other Bluetooth device