Possible Facebook campaign setup post iOS 14 with SKAdNetwork?

Every set up will depend on the app. The key thing is to map out how conversion values tie to custom events. The Facebook event manager with value sets will allow you to tie these custom events to conversion values so facebook can gain semantics according to what matters for optimization.

This type of set up preserves the ability to continue running AEO and VO campaigns with the best optimization available on iOS 14.