Talk to Nephrologist on Asking About His Future Betterment

My father has diabetes and a previous brain haemorrhage/stroke in feb 2025 but recover in july. His creatinine was 2.1 and is now 1.6, but urea has increased from 42 to 62. Please tell us diet precautions, and his long-term prognosis. What lifestyle changes are needed to prevent further kidney damage. As bp controled rehta hai sugar bi kabhi 300 tak jati hai normally better rehti