Your Facebook page is monetized but the income is always zero. It’s now months after monetization but your page isn’t earning. One of the reasons is that the account is limited because you are not following the policies. Check your profile and see whether there are policy warnings. Once those warning are removed, you will start earning money.
Another reason is that your content is not original. You are copying content from other creators without adding any meaningful things to it. Your videos are from TikTok and Facebook doesn’t monetize them. Such content is considered to be of low quality, which won’t earn you any money.
Your content cannot be monetized; it’s among those niches which are barred from monetization. If your content contains adult content, you’ll lose monetization opportunities.