For us to look into this further, can you share a screenshot of your channel's monetization page: https://yt.be/help/xukU ? Just to confirm, were you a part of YPP earlier or a first time applicant? Keep us posted.
Thanks for the screenshot. Monetization can be disabled for several reasons. We suggest taking a look at our Help Center article for more info on why it can happen and how you can resolve it: https://yt.be/help/u6Rr . Hope that helps.