Rename the .ipa to .zip, and extract the documents. You should now have a folder called Payload. From here, extract the binary file from inside /Payload/<game or app name>.app, and the global-metadata.dat from inside /Payload/<game or app name>.app/Data/Managed/Metadata. You will also need to copy the Unity Version from unity default resources inside /Payload/<game or app name>/Data.
how to get the binary ? im doing it on call of duty mobile..there is an extentionless file cod is that it ?