Dear Creators, We have so appreciated your support over the last 24 hours. Thank you to everyone who made videos, tweeted, and reached out to YouTube during this difficult time. Your support means more than you realize.https://twitter.com/YouTube/status/981657677435584512 …
Once you hit your milestone, it can take 1-2 months for the play button to be ready. You'll be notified in Creator Studio as soon as it is available.