Short answer
Laufey's story begins after the funeral turning point, when she wakes in the Everywhen and realizes her plan for Kratos and Atreus is under threat.
Why this is the real start
The Greek saga explains Kratos. God of War (2018) gives the funeral turning point. Ragnarok raises the family stakes. But God of War Laufey itself begins when Laufey wakes after death and has to act for herself.
What changes here
This is the point where Laufey stops being only the hidden force behind other people's journeys and becomes the active lead of her own.
Plain-English version
The clearest way to say it is:
God of War Laufey begins after the funeral turning point and follows Laufey in the Everywhen as she fights to protect the future she set in motion for Kratos and Atreus.
Related pages
Sources
- PlayStation Blog: First look at God of War Laufey
- PlayStation: God of War Laufey