yes its possible.
use readr package to load your csv to R.
study r4ds https://r4ds.had.co.nz/ chapter 3 to understand how to visualise with ggplot2/tidyverse.
I don't know what an 'admin level' , but if its a factor in your data,it might be as easy as throwing in a facet
however, if you need true iteration, you can studty chapter 21 to understand your options.