Privacy settings can become complicated after years of changing individual posts and account options.
Where a platform provides a “View As” or similar feature, use it to see what people outside your intended audience can actually view.
Check older public posts, profile details, tagged content...
Using “Continue with Facebook,” “Sign in with Google,” or similar options can leave third-party services connected to an account long after you've stopped using them.
Major platforms provide settings where users can review apps and services with account access.
Remove connections you no longer...