I don't consider MOS to be part of the DCEU, to be frank. When it was made, WB really had no ambition to make a cinematic universe, and so when the world was about to be destroyed in MONS all the "meta humans" did not show up. And neither did Batman, who was supposedly established as a superhero for many years then so he should have had done something to try to stop the Kryptonians. That's why in BVS, it made no sense to me that he'd only watch helplessly from the sideline, and decided to stop Superman later in the movie when he did nothing to help in MOS. It is very contradictory to see them trying to retroactively explain everything in BVS about MOS, when the purpose of making these two movies were vastly different. One could say these two existed in completely separate universe.