Summary
As seen in this page (Skeletal Mesh Sockets in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community), it is possible in UE. Not in UEFN though, setting is missing.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
UI/Tools
Steps to Reproduce
Import two skeletal meshes
Create a BP
Have one skeletal mesh attached to the head socket of another
Expected Result
SM can be attached to the head socket
Observed Result
Setting is not there
Platform(s)
PC