On this device there EEPROM is emulated by SW in the data flash. For understanding the principle I could recommend following appnote (although written for different platform, the principle is the same):
https://www.nxp.com/docs/en/application-note/AN4868.pdf
Driver and example project you may find in S32DS, it is called Fee_Example_S32K3xx.
In the installation directory, you may also find user manual for Flash EEPROM emulation driver:
c:\NXP\S32DS.3.4\S32DS\software\PlatformSDK_S32K3_2021_10\SW32K3_RTD_4_4_1_0_0_D2110\Fee_TS_T40D34M10I0R0\doc\
