Emotional numbing/apathy caused by ECT

Only looking for advice from qualified professionals or people with experience of ECT on this subject matter.

Someone I love had very severe depression and PTSD and was thrown by their family into a 'rehab' center where they were unethically subjected to multiple sessions of ECT. Once they got out, I couldn't recognise them anymore. Their entire personality had changed. This was someone who had so much emotional depth, felt everything so deeply, loved deeply, and always had such a rich mind. Most importantly, they had empathy and the ability to truly care. Now, this person is a hollow shell - completely empty with no emotional depth, no ability to feel empathy or any deep emotions like love and sadness. In their own words, they are unable to form a lasting connection with anyone and don't even want to anymore. They are also unable to physically cry any longer. They're also on a heavy dosage of multiple antidepressants.

Is there any chance that this person can ever go back to being who they were? Has ECT completely and irreversibly wiped out their ability to feel anything deep and meaningful? Or is there hope for them to return to who they once were? I am unable to find much information online, and the effects of this seem far too similar to that of a traditional lobotomy. I just want to know if there's any hope for me to once again meet the person I once knew and loved so much, as they originally were.