Shell--Gruvbox-Dark-B-LB Cursor--PearDarkCursors Background-- is my own image from a family trip then i used this GitHub project https://github.com/paulopacitti/gruvbox-factory I also used Gruvbox dark Firefox extension and the Gruvbox color pallet for Cavalier
Its not much but i enjoy it!
I haven't used it but you might be interested in stylix. I think once it's setup it will automatically theme a lot of these apps for you.