The only thing about Facebook is that it still has a very affluent and engaged user group.
If your using IG there's no reason not to use Facebook and control the two of them using the meta business suite.
The social media platforms aren't doing anyone any favours anymore. If you want engagement you pay for it. Bottom line, these are advertising companies and if your not paying for advertising your not their customer, you're an end user.
For many small community groups there is still no real alternative to Facebook, so your local sports groups, your local games groups, parent groups, special interests groups, they are all still on Meta platforms and they all have money to spend which makes them the main target of online advertising platforms.