Currently, Android apps are available to use on Windows 10, but only with the Your Phone app that Microsoft rolled out last year. On the bright side, you don't actually have to wait for Windows 11 in order to use Android apps on a Windows PC anyway.
The date still hasn't been confirmed for when they'll be available to the public. Microsoft plans to bring Android apps to its app store, but even if you get Windows 11 today, Android apps won't be available yet. Either way, you can look forward to the ability to use Android apps on Windows devices. Windows 11 starts rolling out today, but since it's a staggered rollout, you might not get it just yet.