Most of those are not school shootings. Here's a more comprehensive list: https://en.wikipedia.org/wiki/List_of_school_massacres_by_de...
As you can see, the vast vast majority of school shootings occur in the US, with China coming in at a distant 2nd place. There are only 4 school massacres in Brazil (of which only 2 involve a gun according to wikipedia), and Brazil is a country with a population of more than 200 million.
Gun violence in Brazil has historically been rampant, but school shootings there are in fact _extremely_ rare.
Here is an entire list: https://en.wikipedia.org/wiki/List_of_massacres_in_Brazil