Beth's mom becomes her manager, traveling all over the country for Beth to compete in various chess tournaments.

Source: https://screenrant.com/queens-gambit-alma-death-reason-explained/

Maggie and Daryl both kept Beth's memory alive years after her death.

Source: https://www.cbr.com/what-episode-beth-dies-walking-dead/

While we don't see much of Beth's relationship with her mother prior to this event, it's implied that they had a much softer and more traditional mother/daughter relationship beforehand.

Source: https://collider.com/yellowstone-why-did-evelyn-dutton-hate-beth/