All functions in the API-MS-Win-Core-Misc-L1-1-0 set are documented exports from KERNEL32:

For most of these functions, the implementations in KERNEL32 version 6.1 and higher are just stubs which transfer the handling to wherever the schema redirects the API Set. The exceptions are:

New Locations

Non-trivial implementations of all functions in this API Set are exported from KERNELBASE version 6.1 and higher, even if very nearly duplicating a substantial implementation that persists in KERNEL32.

Schema Redirection

The Windows 7 schema redirects this API Set to KERNELBASE. Thus:

DLL File

Though version 6.2 of ApiSetSchema.dll defines the API-MS-Win-Core-Misc-L1-1-0 set, Windows 8 and higher do not supply an API-MS-Win-Core-Misc-L1-1-0.dll file.