Cover the scab and surrounding area with a topical cream or ointment to keep the scab moist in order to heal better? (photo)

This looks like a healing wound with a scab. Best practice is to leave any scab to separate of its own accord, don't interfere with the healing by massage or rubbing in any creams. If it starts to leak fluid, become painful and red or smelly discharge then it might be infected. Return to your PS at that stage if you have any further concerns..