Is there a need for a way to separately address the future of parallel (past) lifetimes? Is this another row I need to add to the Soul Matrix or is this already being addressed?

You would think this would be already covered by the Soul Matrix paradigm you have put in place and described in your book, but in fact, there is an additional step you can add. This can indeed be depicted as a top row extending from the past lifetimes into their future in the same way as the current life appears above the bottom row of future lives and is representing extension of the present into the future. This will cap things off nicely because it will be including a full understanding and therefore a full intention for these various circumstances to be dealt with. So in a sense, this makes the Soul Matrix Healing work even more akin to the Quantum Healing by attending to the differing time domains of the various lifetimes in motion. The requests to carry healing forward into the future are taken to mean by the divine realm the current future potentials and not the future potentials that may be emerging after the session is completed. So there needs to be a quantum healing intention added to the Soul Matrix work to maximize its effectiveness and this will leave fewer loose ends. You can revise your diagram accordingly, and in addition to describing this more fully in the text, modify the request within the Protocols for Soul Matrix Healing to state clearly the intention for the healing to persist in being applied on an ongoing basis into the future of current life and into the future of all past lifetimes as well and that will do very nicely. This could be added to the Quantum Healing steps, but is more powerful to include within the Soul Matrix itself because this has the fullest array of influencers taken into consideration.