This time is just chilling for Nokia smartphone. Nokia 8 comes with Android 8.0. But you need to sign up for Beta Labs.
This new Android version not available with Android 8.0 publicly yet. This will allow HMD to squash any bugs before the software rolls out. According to HMD this new beta version downloads directly store.
Android 8.0 Oreo start Download for Nokia 6
You can download beta version from here
HMD Global’s General Manager for Australia, New Zealand, and Indonesia regions, confirmed that the Nokia 3, Nokia 5, and Nokia 6 smartphones come with New Update.