How to sync existing sqlite with firebase or mysql server

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Java

Android4x

Hi I have develped a game application that uses sqlite to store the games activities like scores, moves, time, level, etc. Users can have access to their individual
scores in the game, which works fine.
But my question is how can i sync the existing sqlite in the app with firebase or my own server for me to have access to all the players and their scores from a central location
i.e backend.

Kindly help

What I have tried:

I have tried google search and stackoverflow related issues