Playing on iPad, have restarted the game a few times, and she will not appear in Valhalla. Version 1.5.449
pixel_player152629987 She should be in Fensalir first, did you talk to her there? Check once. What does your quest tab say?
It says talk to Frigga, I already woke her up.
pixel_player152629987 The quest tab should also have a "Enter" button, which will take you to where Frigga is. If it takes you to Fensalir, look for her there and talk. If it takes you to Valhalla and you stll don't see her anywhere, contact support.