Nokia Mobile just started the rollout of Google’s may security patch to Nokia devices. The Nokia 5 and Nokia 6 (2017) are the first devices to get the security release.This is a security-only release and hence the security patch is all that the update carries. The size of the update is around 140MB.
It’s good that they keep on alternating which devices receive the update first with every new update. This, IMO keeps all users happy. Other Nokia phones must be in the row to receive the May update.
If you are a Nokia 5 or Nokia 6 user, then head to Settings > System > System Update to make your phone check for updates immediately.