As of my last knowledge update in September 2021, Facebook Reels did not have a monetization feature like other platforms such as YouTube. However, Facebook frequently updates its features and policies, so it’s possible that there have been changes since then.
I recommend checking the official Facebook Reels documentation, browsing Facebook’s creator monetization resources, or reaching out to Facebook’s support for the most up-to-date information on monetizing Facebook Reels. They can provide you with the most accurate and current details on the available options for generating revenue from your content on the platform.