I’m surprised by how may don’t have a dark mode though. I decided to do it for my blog despite not really using it myself, and ended up sticking with it on. Still getting blasted in the face by eggshell white everywhere I click.
Mobile Safari only does this for sites that implement dark themes (and when you have dark mode enabled in iOS). But many sites don’t have these themes. The Noir extension seems to fix the problem for now. There is a reader mode that can go dark but it’s manual, per article
I see. Not a Safari user myself. On Firefox & Chrome Dark Reader can force its own dark theme even if the site doesn't provide one. Like Noir does on mobile Safari.