So long as you meet the eligibility and program thresholds, you can expect to hear back in a month or so. Note: all applications are still manually reviewed, so it does take a bit of time! If it's taking longer that likely means your channel is being held for a second review.
For us to look into it better, mind sharing the screenshot of your channel's monetization page: https://goo.gl/MVyW5W ? Keep us posted.
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