That's because Captain America: Brave New World brings adamantium into the fold. The substance shows up in the body of the Celestial that emerged from the Indian Ocean in Eternals. Now, it's the cause of international conflict, as major world powers try to control the world's only known adamantium supply.

The reality of the MCU in 2025 is that most everyone knows Avengers: Doomsday and Secret Wars will reboot, or at least reset, the entire cinematic universe.