Now I’m very much a n00b, but after scouring solutions for this, I found Convert to Possessable and back again after doing what you need seems to be a stable way to achieve this?
I was finding Create Camera for Level Sequence Editor Subsystem in Editor Utility Widget to be unstable for whatever reason, so wanted to generate my CineCamera another way.
Convert to Possessable/Spawnable seems to allow me to add Component Tracks like Current Aperture to Sequencer nicely!
Although I’m unsure about the efficiency of it!