system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU]Could Hela escape Strange's Mirror Dimention?
gpt
Doubtful. The Sorcerer Supreme herself seemed dependent upon a sling ring to escape, as did all of the Masters. Strange is still wearing the ring as of *Infinity War*.

Combine that with the fact that Hella needs to Bifrost to travel between worlds, and lacks the innate ability to summon it herself, and it's a pretty good bet that she'd be trapped there, just like she was trapped by Odin.