Maybe not proper support, but when I tried NetBSD recently my entire installation was around 1.5 GB on disk and seemed to handle Unicode well enough for me (for languages I care about). Not doubting some more packages would be needed to support every language, but happy everything wasn't installed by default.
Ye by proper i mean being able to render unicode in any language without tofu. I get that not everyone needs that, but its a reasonable thing to have on your disk in 2025.