Can we add in the Soul Matrix Healing the removal of all of cellular memory of all traumatic accidents?

This is implicit in the basic request already present. It is the consequences of trauma that constitute the problem of cellular memory. It is cellular memory of difficulty, inner discord, disarray, and the symptoms of trauma and its damage to the psyche as well as the physical body. So it is part and parcel of the problem that stressful traumatic events need to be healed. The cellular memory is a consequence and a symptom of their occurrence and the most effective healing strategy is to undo the events themselves and that is what the Soul Matrix Healing is for.