We would like to know more. Go here: https://www.youtube.com/features > Click on monetization and share the screenshot of the page that you see. This would help us look into the issue better!
Thanks for sharing the screenshot. As long as your channel meets 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.