True.
The power reversal trick removed all of what made him "super", so he was no different than a regular human. Add that important detail to what happened to him moments later, and any mind free of self-deception knows Zod was hurled into the chasm to meet his maker, not the absurd belief that he just landed somewhere below, as if there was an outcropping or feather bed that just so happened to be down there for no apparent reason which would not have supported the expected conclusion.
ETA: I still haven't The Flash but I am very curious on that movie's take on Supergirl.
Looking back, Sasha Calle was the best part The Flash (not counting the Affleck and Gadot cameos) considering how truncated her part ultimately turned out to be.
Originally, she was going to star in a solo Supergirl movie, but that--like so many things in The Flash and Aquaman 2--was cut as the hammer fell on the DCEU's future. Unfortunate decsion, as Calle's more non-nonsense Supergirl still finding her way was the foundation for at least one good Supergirl film.
I always enjoyed Melissa Benoist take on the character, even though I couldn't finish the series. As with, for example Capaldi and Whitaker, it wasn't the show's lead that make me lose interest but rather the writing that just got worse.
Yes, many of the seasons were quite terrible.