Yeah I was confused because some consider Conner as the first and Jon second but Clark was the first Superboy though cannonically now he isn't but still ....
I believe Clark’s time as Superboy was restored to be canon again, but I couldn’t say which comic that occurred in. I believe these’s a scene with him as Superboy in Doomsday Clock, but I could be mistaken.
Him with Blackfire just kinda seems wrong considering Conner is long even a year old I think in the Titans continuity and is already doing the devils tango with her, come on DC.