Not really. Kotlin/Native was really started to be able to use Kotlin on iOS, but it’s implemented using LLVM which allows for multiple “native” targets (any target LLVM supports). It creates an entirely new runtime environment which is unique to Kotlin, but the goal of Kotlin Native is just to be able to run Kotlin anywhere.
I haven’t used Graal myself, but from what I’ve seen it seems to be geared more towards seamless language interop, and ahead-of-time compilation of Java apps (for better performance and smaller overall footprint, since you don’t need a full JDK installed on the local machine to run the binary).
So while the output of both Kotlin Native and Graal Native are the same (native binaries), the goals of both are very different.