I have seen a pic of a stick-type with black elongated-egg shaped head/body, seemingly not much changed from WW2/Vietnam War type but surely they've moved on design-wise??
I belive this frag (M 86p) is fairly currentView attachment 76087
I'm not sure that the time-line matches up. You are talking about a period of over 20 years now, when did Germany develop, when was it copied, etc?
Following Cat-UXO (https://cat-uxo.com/explosive-hazards/grenades/type-82-2-hand-grenade) the Type 82-2 has smooth metal body:From their website, they are referring to this type 82-2 model with quotes of its use in the Iraq war:
View attachment 76258