If your kernel is not supported, KernelCare will detect it and do nothing. There is no danger (but also no benefit) of running KernelCare on unsupported cores. KernelCare will provide an "unsupported kernel" message when it knows nothing about a particular kernel. See the list of supported kernels or learn to check if your kernel is supported in the official documentation.
If you still have questions, feel free to visit our KernelCare page or contact us by opening a support ticket or by using our live chat feature.