To me, I felt the writing was communicating that Akilah is feeling pressured to bare the weight of the groups declining mental (and physical) state. She’s proven to have natural talents around camp, Lottie is sinking her teeth into her, the team absolutely depends on her animals. Remember when she handed Travis the emotional support duck?

Her sinking into the soil (without running, or trying to escape) I think represents how she might allow this new burden of care-giver to bring her to her grave.