On Friday Agents of Shield which is a part of the MCU not only confirmed the multiverse but also confirmed Deke’s theory of being able to travel through them. So Shield has the multiverse traveling tech going forward in the MCU.
While the show follows the movies, the movies do not acknowledge the shows. SO any Canon used by tv might not translate to the movies. I remeber a few years back that Chloe Bennet complaned about that to a fans question during a Convention. I also remeber the same Happening to the netflix series.
I imagine Nicolas Cage is somewhere smiling now.