There's a launcher called BaldPhone, which looks pretty big-shaped and high-contrast, and also open-source: https://baldphone.com
Presumably there are Android phones with oldschool physical navigation buttons—at least there were back when the sky was bluer and the grass greener.
Dunno how the launcher is on the configuration side. But in general I'm sorta attracted to the idea of using it myself. There's the rawness and clarity akin to modernism.