Hi,
Thank you so much for your interest in our products and for using our community.
For KE1xZ devices we have 4 evaluation boards: FRDM-KE15Z, FRDM-KE16Z, FRDM-KE17Z512 and FRDM-KE17Z. And just the FRDM-KE17Z512 has the IEC60730B Safety Library in the SDK version 2.16.000.

However if you look for Middleware in MCUXpresso SDK Builder you can find all the SDKs that contains it.

And for example, FRDM-KE15Z has this Middleware, but in SDK version 2.13.0:

And apology for the confusion. And hope it helps you.
Have a nice day!