Even though (in my opinion) all first-gen Niro and Kona models have the ingredients to eventually suffer GRU noises, the facts are that only a small number actually do, at a wild guess from reports over the years perhaps only 1%. The motor issue, which I believe is unrelated, is even less common.
At 30k miles all you can do is to slightly reduce the risk of a GRU noise by changing the gear oil once. Kia dealers are well known worldwide to balk and squirm at this simple request but there's another option which is often less expensive. Purchase two US quarts of Redline MT-LV oil and ask your local Nissan Leaf owners if they know of an independent service workshop. It's the same job as on the Leaf and much the same as changing oil on a diff or manual gearbox, you just refill it until oil spills out when the car is level. You'll find the old oil is free of particles but pitch-black.
You can't do anything about the motor issue, it's just a matter of luck and my Kona is in the same boat.