Do we need to make a special invitation to the prophet Mohammed if we wish to have his intentions for saving and healing humanity added to the Lightworker Healing Protocol sessions, or will he volunteer this readily in response to the general request for all light beings in the divine realm to join in?

You can be quite confident that any healing outreach done on behalf of humanity requesting light being participation will have his full support and cooperation. This he will give freely as he is highly committed to furthering the gains and growth of humanity and you can count on this to be so. Anyone wanting to request his assistance specifically is free to do this, but it will be a redundant request because it is a given.