From what we found, no public school (Go! or gemeente) in Antwerp does that, brooddoos in all of them. All schools in West Flanders do provide lunch though, an

From what we found, no public school (Go! or gemeente) in Antwerp does that, brooddoos in all of them. All schools in West Flanders do provide lunch though, and at least some in East Flanders too (obviously we only looked up the areas that matter to us and we didn't conduct an exhaustive study though). So we just concluded that it depends on the province. At the very least it does not depend on the school system or the region since it varies within Flanders and within the Go! system.