What about this makes you think that? Microsoft cares about getting Android _users_, I don't think they care that much about the Android OS beyond their rather poor implementation on the Surface Duo.

Microsoft at least appears to be interested in Android. To me it feels like Google has lost interest in the product.

I'm asking what makes you feel that way? Google is actively releasing new Android versions (Android 12 announced yesterday) full of new features. In what way does that make you feel that Google has lost interest in Android?

MS can do their own Android. And it wouldn't even be a terribly stupid ideea. They already sell laptops, so why not phones?

Microsoft already sells an Android "phone" https://www.microsoft.com/en-us/surface/devices/surface-duo

Surprised with this they didn't do like Amazon and make a ms version of android

They probably have a decent estimate of the investment cost it would take to compete with "Google Play Services". Seems a big part of why they are working with Amazon for this Windows support.

They supposedly worked with Google on this, which rules that out.