We'd like to understand this better. Could you please click on 'Here's why you channel wasn't approved for monetization' & then share a screenshot with us? Also, have you reapplied for monetization or is it the first time? Let us know.
Thanks for the info. We review all applications carefully–as you weren’t accepted into YPP at this time, check our article about reused content & how you can avoid them: https://yt.be/help/AsbB . Make any changes based on those details and always re-apply after 30 days.