Due to us can be replaced by a number of synonyms that convey the same meaning. Among the most common are "owing to us," "because of us," and "on account of us." These phrases all suggest that something is a result of our actions or decisions, or that we are responsible for something in some way. Other possible synonyms for due to us might include phrases like "as a result of our efforts," "thanks to us," or "in light of our contributions." Overall, choosing a synonym for due to us can help to add variety and interest to our writing, while still communicating our intended meaning clearly and effectively.