Installing and removing the port are surgical procedures for which anaesthesia is used. Because of all that her body is enduring, they want to avoid putting her under unnecessarily. As you know, they put it there for easy repetitive injections, and they want to make sure that they are finished so they don't keep opening and closing her, which is a big infection risk. They want to see consistent "wellness" (whatever that will look like) for a certain period of time before they can feel fairly confident that they won't be just going right back in. Her body can only do so much at once and be effective. If it has to focus on healing that incision (from the port, installing or removing), then that distracts her "healers" from her disease. Healing takes a lot of energy; you want her system to focus on the cancer and the effects of the chemotherapy.
Yea, for her continued improvement. I wish her the very best.