Hi @nandanchaturbhuj
S32K388 is a sub-derivative of S32K358, you can use the available examples, but you need to make some changes.
If you need more information, please contact the person that provided you with the device for further support on this part.
As the S32K388 is not yet available for the mass market, the information about it is not public, and I am not able to check and verify it as I do not have the information due to the security levels when working with automotive parts such as this.