From a psychoanalytic point of view, there is the hunger for hunger. Through food or oral food intake, emotion regulation and stress regulation often take place, which can be problematic. In Japan, there is a saying that when a person eats too much, his mouth is lonely. Loneliness in times of pandemic, but also as a social-cultural phenomenon, would be a different horizon of understanding.
Psychodynamic hypotheses in eating disorders refer to separation disorders in the early mother-child relationship, early traumatizing experiences, loss of support and conflicting oedipal bonds. In terms of affect psychology, eating attacks are understood as failed attempts to use to deal with internal tensions.
Eating behavior becomes the regulatory mechanism for an unstable self, for projective disposal of negative self-proportions and distorted self-idealization. Ego division, shift from the psychic to the physical and pseudo-autonomy should accumulate feelings of being alone. In psychoanalytic treatment, it is often difficult to engage in self-reflection, as long as psychic content is "devoured" rather than "digested".
Questions of identity play a more important role today. The boundaries of what is possible are also becoming blurred.
This is certainly not a universal explanation, but an attempt to understand.