We'd like to look into it. Mind sharing a screenshot of your channel's monetization page: https://yt.be/help/k3qM ? Also, to confirm, were your part of YPP earlier or is it the first time you applied and got rejected? Keep us posted.
We review all applications carefully–if you weren’t accepted into YPP at this time then check our article about reused content & how you can avoid them in future videos: https://yt.be/help/AsbB . Make any changes based on those details and always reapply after 30 days.