The death process itself has been described various ways and again, there can be individual variations in the process. But these are mostly subjective. Someone dying in a coma, or unexpectedly, or very consciously will each experience it differently.
Descriptions tend to emphasize certain aspects. For example, I noted a recent mention that after death, the air element is dominant. The energy is withdrawn up to the heart (air element) and out of earth, water and fire aka the lower chakras aka out of the physical, emotional and lower mind – our specific individuality.
I described some of the subjective experiences of the process here. The lower aspects begin to dissolve but the deeper impressions and karma are carried forward.
There is typically a few days or weeks transition period, then a moving on to a new role. If someone is very attached, they may take more time to move on or may refer back to loved ones a lot. I imagine this depends on the role they next have. Some transitions come with a forgetting and they cease their connection to prior relationships. There are lots of variables.
My father, for example, showed up occasionally over some years and then took a new human birth and ceased to be accessible.