Since gaming now lives at http://YouTube.com/gaming , the old Gaming app is going away on May 30th! If you were subscribed to channels in the Gaming app, they’ll automatically move to your YouTube subs feed on May 14th. More need-to-know info→ https://yt.be/help/yRe4
As your channel has met the eligibility and program thresholds, you can expect to hear back soon. If it's taking longer, it could likely mean your channel is being held for an additional review. Appreciate your patience in the meantime.