Expert Needed to Publish Flutter App on Google Play Store (Core Functionality Issue Fix) -- 2

I am seeking a seasoned professional or an established firm with a solid track record in app publication, specifically with Flutter-based apps, to assist in getting my app onto the Google Play Store.

Technical Background:
- The app utilizes technologies such as Flutter, MySQL, Google Cloud, and Amazon S3.
- We've previously attempted to publish it ourselves but faced a "core functionality" issue. The primary blocker appears to be the MANAGE_EXTERNAL_STORAGE permission.

Key Requirements:
- Hands-on experience in resolving Play Store compliance issues is a must.
- The ideal candidate should be able to either guide us through the publication process or handle it directly.
- Prior experience with the specific issue related to the MANAGE_EXTERNAL_STORAGE permission is crucial, as well as being able to provide a clear path to resolution.

Target Audience:
- The app is aimed at users on Android 10 and below.
- We have fully reviewed Google's storage access policies for compliance.

Skills and Experience:
- Proficient in Flutter and Android app development.
- Extensive experience with Google Play Store publication.
- Previous experience handling MANAGE_EXTERNAL_STORAGE permission issues.
- Strong understanding of Google’s storage access policies.

Please only apply if you meet these requirements and have a proven history of resolving similar issues.