Weird enough, there were 4 known major magicians in the MCU Dr. Strange, Scarlet witch, Loki, and ant man. Only ant man managed to survived everything from infinity war
On the contrary, I support the theory that, after several failed attempts, the agent thoroughly believes that Scott is a magic user and is using his divine power on simple smoke and mirror tricks.
Funny thing is that he does the card trick in the fourth episode of WandaVison. When walking up to Monica outside of the town. You can see how impressed she is with it.😂