Bannerlord has a feature to die by age or by the cut of the steel. Its one of the key differences between bannerlord and warband, but without funerals for those characters its just makes them look and feel like a another generic npc. This is one of the most lacking aspects of bannerlord. It feels more like simulation genre than sandbox. Please start to improve immersion by these little touches. I dont think its challenging development side, but of course im no developer. It can be as simple as choosing dialoge sequences in the funeral about the departed and getting influence dependant on those dialoge choices.