Hello,
I would be glad to help you to modify the react native app as I have sound experience working with Flutter and React native for cross platform mobile app development. Apart from mobile, I have a great experience working with PHP, Laravel, Wordpress, and MYSQL service for backend development.
Let me share the documents that contain a list of modifications and existing app link. We can also hop on call/chat for further discussion.
Awainting for your response!
Regards,