Can same cell in 5G be used both as NSA and SA?

So if the UE does not support SA it will be able to use it for NSA and other UEs will be using it for SA? The cell will be connected in such case to both EPC core and 5G core.

Yes it can serve both SA and NSA

So it must support two sets of interfaces Ng/N1 to connect gNB/eNB to 5G/LTE core networks, right?