Hello @saurabhkulkarni123,
Unfortunately, we do not have such blocks for reading/writing data on SD Cards.
However, I think you could start by adding/porting the FATFS library for the S32K148 and integrating such library using custom code, as described in the link [1]. Also, I see there is also a thread regarding the FATFS on S32K144 (this part is similar to the one for the S32K148 but the number and package of the peripheral differs) that might also help you/guide you through this process.
[1] https://community.nxp.com/t5/NXP-Model-Based-Design-Tools/How-to-use-your-own-C-code-in-our-Toolbox-...
[2] https://community.nxp.com/t5/S32-SDK/S32K144-Fatfs/m-p/1199415
Hope this helps,
Marius