Herbal this and herbal that medixine might decrease one point to 2 points of his creatine from 10 to 9 maybe. But they will not fix the damaged parts. Yakhni piyay zyada. Intake water utna hi ho jitna output ho urine ka. Baqi transplant process when donor is found is easy as u said. But to find donors and operate them as well as the patient and matching process. It takes time.
But transplant is the only option. And doctors also check keh transplant ke baad is ne dobara wohi kaam krnay jis se gurday fail huay tu they will disqualify the candidate for transplant.
Sugar ka khyaal tu kiya nhn. Sugar tu rehni hei. Next kidney might fail as well.
Aur transplant rejection is another thing to worry.
Good luck. If the patient plus his family do NOT learn to control his sugar levels and patients does not stop his sugar cravings or doesnt do exercises or doesnt eat balanced diet containing proper meal and vegetables. Next kidney will fail as well.