I am glad that you found what you were looking for.
Congratulations! 20 days is a good achievement.
Longer the fast better care you need to take in how you break your fast.
To answer your question about supplements, I would say, No. let your body learn to absorb nutrients from plant based foods, masticate your food to a slurry to help better the absorption of nutrients. Two weeks after fast you can introduce fermented foods, such as Kimchi, Sauerkraut, Kombucha, Kefir, etc. If you do not have digestion issues then don’t take enzymes, raw foods will do the job there for you. Vitamins are partial foods, so not much help. I do take some supplements like Iodine, Magnesium and vitamin D3 especially in winter.