It's quite simple to check your Youtube channel have a eligibility to monetize or not. Just go to Your Channel Youtube Studio and Click the Earn menu link, check whether you have a Eligibity or not. FYI, if you want to know about the youtube monetization requirements in the year of 2024, as per the recent YouTube Partner Program u must have 500+ Subscribers and 3000+ Watch hours or 3 million youtube shorts views to get monetized the channel.