Change in diet since diagnosis/treatment

Has anyone changed their diet regimen after diagnosis/treatment of High-Grade NMIBC. I see some recommendations to increase raw cruciferous vegetable intake (broccoli, cauliflower, kale, Brussels sprouts, cabbage). Also, avoiding a Western dietary pattern high in red/processed meat, fat, and refined grains. Not sure if it will help prognosis, but just wondering if anyone has come across this or if their doctors address diet.

Thank You