Get the value of a specified field from a keychain with multiple key-value pairs

[teodoraschipor]

I want to share my keychain between 2 apps:

I have App1 (developed in a programming language) which sets the keychain with multiple key-value pairs.
And I have App2 (react native) where I have to retrieve a specified field from the keychain, but I don't know how.

I found this https://stackoverflow.com/questions/60352579/how-to-save-multiple-key-values-using-react-native-keychain but I cannot use getGenericPassword because the service is already set by the App1 with other value than the key, neither getInternetCredentials because the server is not set by the App1.
What would be the solution for this? Thanks!

[BraveEvidence]

This will help https://www.youtube.com/watch?v=J0OSn7s9YiA&list=PLQhQEGkwKZUrempLnmxjt7ZCZJu1W3p2i&index=15