My primary school had a 'Screen-Free Week' each year to encourage non-screen dependence, which my parents enforced (for us kids, not themselves). Now that homework is invariably set via online apps and all my schoolwork is in digital format screen-free weeks are pretty much impossible to have now.
Even my old school gave up on it and moved to computers as well, especially during Covid. Note that before this learning at the school was fully paper-based, projectors were used only for assemblies, and the only time computers were used was for Computer Club.
I agree that screen-free days are a great idea for younger kids, they should learn how to use their own imaginations for entertainment like we used to, instead of getting it all fed to them by streaming and social media services. However, the way the world is now going screen-free for a long-term period is largely unfeasible or impractical for most people over 13.