Bitcoin Core currently only support to using RDRAND / RDSEED instruction on x86 architecture when requiring to generate a ultra high quality random numbers. For example, a private key.
https://github.com/bitcoin/bitcoin/blob/master/src/random.h
https://github.com/bitcoin/bitcoin/blob/master/src/random.cpp

ARM later added two new similar instructions as well, RNDR (similar to RDRAND) / RNDRRS (similar to RDSEED).
https://developer.arm.com/documentation/ddi0601/2022-12/AArch64-Registers/RNDR--Random-Number
https://developer.arm.com/documentation/ddi0601/2022-12/AArch64-Registers/RNDRRS--Reseeded-Random-Number

OpenSSL also had a similar feature request on last year. (Implemented)
https://github.com/openssl/openssl/issues/15627
https://github.com/openssl/openssl/pull/15361
https://github.com/openssl/openssl/blob/master/providers/implementations/rands/seeding/rand_cpu_arm64.c

I hope this feature is also available on Bitcoin Core as Bitcoin Core also can using on ARM machine (E.g. A Mac computer using Apple silicon, Raspberry Pi...).
{
    
    SeedFast(hasher);
    
    SeedTimestamp(hasher);
    
    rng.SeedEvents(hasher);
    
    auto old_size = hasher.Size();
    RandAddDynamicEnv(hasher);
    LogPrint(BCLog::RAND, "Feeding %i bytes of dynamic environment data into RNG\n", hasher.Size() - old_size);
    
    SeedStrengthen(hasher, rng, 10ms);
}
static void SeedStartup(CSHA512& hasher, RNGState& rng) noexcept
{
    
    SeedHardwareSlow(hasher);
    
    SeedSlow(hasher, rng);
    
    auto old_size = hasher.Size();
    RandAddDynamicEnv(hasher);
    
    RandAddStaticEnv(hasher);
    LogPrint(BCLog::RAND, "Feeding %i bytes of environment data into RNG\n", hasher.Size() - old_size);
    
    SeedStrengthen(hasher, rng, 100ms);
}
enum class RNGLevel {