As mentioned, everybody is supposed to have a license plate - even a temporary one. In reality, it’s rarely to never enforced, cars and/or license plates are frequently stolen (especially Hyundai/Kia), all manner e-ink plates even stickers plates are allowed. Frankly this has really enabled a cottage industry of thieves and criminals.
I’m generally against a surveillance state, but the utter lack of enforcement on this issue enables and possibly encourages a range crimes