Internship scope creep or am I overreacting?

I recently started discussing a Flutter internship with a small startup. During the interview, the expectation was that I would work on the Flutter side of the app while the team would provide a PRD and system design for the feature.

However, after joining the discussions, the scope seems to have shifted quite a bit. Instead of just implementing features, I’m being asked to design and break down an entire module myself. The module involves things like background services, GPS tracking logic, Bluetooth detection, ride state machines, anti-cheat checks, etc., basically a full “auto ride detection” system for a mobility rewards app.

The timeline mentioned is about 1 month to get it TestFlight-ready, and the compensation offered is Indian Rupee 15k (~$180) for the month.

For context, I’m still a student, this is my first internship, and I would be doing this alongside university work. I don’t mind learning new things, but the scope feels closer to building a fairly critical system module rather than a typical intern implementation task.

Am I overthinking this, or does this seem like a mismatch between scope and pay? Curious how people here usually evaluate situations like this, especially with small startups and remote internships.