Hi @Kunal_Gettobyte
Sorry if my previous response was not clear enough.
Both the HSE DEMO APP and the S32K3 MCUs for General Purpose HSE Demo Examples already provide examples for installing the HSE firmware as FULL_MEM or A/B_SWAP. These applications are designed to be used with T32 Lauterbach or PEmicro, as these are the devices we directly support. However, the process can be performed with any programmer that is compatible with our devices.
Additionally, we have an application note that explains the steps to install the HSE firmware, which is also available in the secure files. As previously mentioned, for further details, it is recommended to consult the HSE Reference Manual.