Welcome to the Make community!
This is not possible, because Facebook no longer allows it. Nobody can access or post to Facebook Groups any more, because Facebook removed the API option. To resolve this, please contact Facebook to add it back.
For more information, do view these similar questions previously asked by other community members, which may answer your question:
- Send new telegram message for new Facebook group posts
- Facebook Group App is missing?
- Due to the deprecation of the Facebook Groups API, we (Make) will be discontinuing our Facebook Groups app
- Auto post to Facebook Groups from Facebook Page
- Answer for new post on facebook group
- 📣 Facebook Groups will be discontinued due to API deprecation
Next time, please try to search this forum first for existing answers. This may help you get to the solution faster, and also help keep the forum organised. Thanks for your cooperation!
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.