Hi, @XH,
Thank you for your interest into Model-Based Design Toolbox for S32K3.
First of all, what versions of MATLAB and Toolbox are you currently using? This way, we can try to reproduce your problem directly on your setup.
Until then, try reopening MATLAB and Simulink and refreshing the Simulink Library, by pressing F5 or by right-clicking on any section in the dropdown:

Keep us updated on your progress.
Best regards,
Dragos