nextUBytes

Fills the specified unsigned byte array with random bytes and returns it.

@ExperimentalUnsignedTypes@IgnorableReturnValuefun Random.nextUBytes(array: UByteArray): UByteArray(source)

import kotlin.random.Random
import kotlin.experimental.ExperimentalUnsignedTypes

@OptIn(ExperimentalUnsignedTypes::class)
fun main() {
    val bytes = UByteArray(10)
    Random.nextUBytes(bytes)
    println(bytes.joinToString(", ") { it.toString() })
}

Source