Microsoft have released the Android sub system for Windows 11 for Windows insiders on the beta channel. The feature only works for devices on the beta channel set to the US region, the dev channel will get the feature soon, but it won’t work at the moment.
To run Android apps you need to have a device running on the beta channel of the Windows Insider Program, virtualization enabled and your PCs region be set to US.
Read more on Microsoft’s blog post,. At the moment the store isn’t available, Microsoft’s blog say the link is coming soon.