Strong links have been shown for the effects on mental health of world issues such as economic instability and the covid pandemic
For example see here. But a person's ability to manage stress can be key in their ability to resist succumbing to unhelpful strategies such as overeating as suggested in this Psychology Today article.
Online therapy compares well with in person for many people
Recent research suggests that therapy on line can be just as effective as face to face in person therapy. See here and here for more in-depth information