Refer to this

https://gisgeography.com/sentinel-2-bands-combinations/

2,3 and 4

if you want to get an image you need to normalize them back to 0,,255 values

you can divide each channel by the max of the channel then multiply by 255 and get int part .

This will give you a good visualization , but infortunately no model seems to be working with such data,

I would be happy if you share any findings.