Italy is the same, "school must be in presence" is a kind of mantra, and though it is (IMHO) right in theory, it fails in practice (where/when teachers, janitors, bus drivers, and even pupils are COVID positive in more than a tiny fraction).
Schools (generally speaking) are due to reopen on monday the 10th, but very likely only a part of them will actually be able to.
I have two toddler granddaughters. Both their parents had COVID last year (presumably delta), so I guess the kids must have caught it too. Their mother teaches in primary school, and is tested daily.
It's completely inadequate to rely on online schooling for small kids; a large part of what's important in their schooling is interacting with other kids. Over-12s: maybe not so much.
So I think it's inevitable that more-or-less all schools are going to be disease-ridden. Really, they always have been (i.e. not just COVID). It's similar with hospitals; the whole point of a hospital is that it's full of sick people. I hate hospital waiting rooms.
Schools (generally speaking) are due to reopen on monday the 10th, but very likely only a part of them will actually be able to.