I actually find neovim to work better than VSCode when dealing with large codebases. Telescope [1] based fuzzy searching makes it easy to find stuff in a codebase and harpoon [2] can then be used to short list some important files and quickly navigate to them. There's definitely a bit of a learning curve and setting up your own keybindings before you feel like you're used to it.
[1] https://github.com/nvim-telescope/telescope.nvim [2] https://github.com/ThePrimeagen/harpoon