I saw that there are items not found in the main menu and I was looking for a mod that would add them all, does anyone have similar mods? and if yes, could you tell me how to install them?
I don't know of any mods that add them, but there is a workaround. Press 'e' in game to open the element search box, then type in the element you're looking for. If that takes too long, you can ctrl+shift+click on it from there to add it to your favourites menu, then they'll be easy to access. I think there's also a way you can edit your autorun.lua file to add them to the menu, but I don't know how unfortunately
My mod (Cracker1000's mod) adds an option to unhide all hidden elements, also placing them in their respective menus.
In case you do not want to use TPT mods, you can press E and search for a hidden element