I don’t think they directly turned her on purpose—but she worked with Mobile Surgical Unit 5 and most likely worked with other Mobile Surgical units throughout the war.
Despite what might be posited about why Anakin and ObiWan couldn’t heal their master or mother, there may be a very simple answer as to why they didn’t or couldn’t do it.
Force healing is a painful process. An extremely painful process for the force user when they use it. They don’t lose any their M count by doing it—but they take in the suffering of the other person they are trying to heal into them.
This also may be why it is or was impossible for Dath Plagues to heal himself. It would have created a loop. You take



