Hi @MVR
First, it is important to mention that the software included in SW32K3_RTD_R21-11_4.0.0_HF_02 is not fully qualified and is not intended for production - it should be replaced by the next qualified standard release (SW32K3_RTD_R21-11_5.0.0).
I am afraid that not really familiar with EB tresos, so for better reference check the S32K3 ICU driver Integration Manual and User Manual provided with the RTDs. These documents provide details about the ICU driver (limitations, HW and SW requirements, usage, configurations, etc.) that might be useful to you. These can be found, for example: C:\NXP\SW32K3_S32M27x_RTD_R21-11_4.0.0\eclipse\plugins\Icu_TS_T40D34M40I0R0
Additionally, a ICU example code is provided with the RTDs (Icu_BlinkLed_S32K344) which can be a good reference for you.