iOS App Launch and ASO

I'm looking for an experienced iOS app publisher to help me finalize and launch my app. The development is complete, and I need assistance with the following:

- Setting up pay tiers for a freemium model with in-app purchases.
- Testing the app in TestFlight.
- App Store Optimization (ASO) to improve visibility and downloads.

Ideal skills and experience:
- Proven track record in publishing iOS apps.
- Familiarity with TestFlight and app payment structures.
- Strong ASO expertise.

Please provide examples of past work and relevant experience.