Instagram has clear rules for developers creating applications or tools for the platform. Automatically increasing profile pictures without user consent is probably not in line with these rules.
Overall, it is important to understand that Instagram takes protecting the privacy and security of its users very seriously. While there are some third-party apps and tools that claim to enlarge Instagram profile pictures, you should be careful and ensure that you respect other users' privacy and follow Instagram's usage guidelines to avoid potential problems.
If you want to enlarge an Instagram user's profile picture, although there is no built-in feature for it, you can still do it by following a few simple steps. Here is a step-by-step guide on how to enlarge the profile picture.