Or who knows, maybe she could take part in an MCU adventure that’s not directly related to her Asgardian roots, like Doctor Strange in the Multiverse of Madness.
With Loki currently filming and Thor: Love and Thunder set to begin filming this August, both projects are plausible places for Lady Sif to show up in.
For now, this is all just speculation, but hopefully the matter can be cleared up one way or the other sooner rather than later.