Migrating existing Base44 Android app to Median while keeping Google Play listing

Hi,

I currently have my Android app “Dexi” in Google Play closed testing. The current Android version was generated through Base44.

I want to migrate the Android wrapper to Median while keeping the same existing Google Play app/listing.

Existing Android package name: com.base6a088b39b0d26e4435546f6f.app

Google Play App Signing is already enabled, and an upload key certificate already exists in Google Play Console. However, I do not currently have the original Base44 upload keystore file.

Before purchasing a Median paid license, could you please confirm:

Can Median use this exact existing package name so I can update the existing Google Play app rather than create a new app?

If I cannot obtain the original Base44 upload keystore, can I reset/register a new Google Play upload key for Median and then use Median-generated AAB files for future updates?

If yes, what exact steps are required on the Median side and Google Play side?

I want to make sure this migration is possible before purchasing the license.

Thank you!