Natalie's death only confirmed Lottie's beliefs to herself, and before she is taken away, Lottie tells the two that "it" is pleased with them for giving "it" what it wanted.

Source: https://collider.com/yellowjackets-season-2-ending-explained/

Perhaps Lottie's revamped her brief stint as a teenage guru and made it her full time career?

Source: https://mashable.com/article/yellowjackets-season-1-recap-for-season-2

Van however is a believer in Lottie's methods to connecting with nature and the group.

Source: https://www.cbr.com/yellowjackets-season2-episode2-recap-spoilers/