Starfield pretty much graphically looks like Skyrim and FO4 in the game to me. It uses the very same game engine and graphic engines, although tweaked each time, so it makes sense it looks like it does. I remember when Skyrim came out people did complain about the graphics. They did the same with FO4. I call it a washed out look. Not sure if that's the proper term but its how I describe it...
Bethesda released a 58 GB High Resolution Texture Pack for Fallout 4 which did improve things slightly and they also announced in October 2022 that a 4K next-gen update would be coming out this year...
https://www.pcgamer.com/fallout-4-is-getting-a-free-4k-update-next-year/