Increase Bash contrast?

[GNOMES]

I have noticed that when editing Bash scripts inputs like command <string> like alias <string> or export <string> or local string, are the same color for both the command and the alias/export variable:

While with say the "default" theme or Catppuccin, the two are different colors:

If this is intentional, how would I go about changing the highlight groups for just Bash?

I see there are no sh/shell/bash configs here: https://github.com/folke/tokyonight.nvim/tree/main/lua/tokyonight/extra, so unsure where I would need to locally patch

My tokyonight.lua:

return {
	"folke/tokyonight.nvim",
	lazy = false,
	priority = 1000,
	opts = {
		style = "night",
		styles = {
			floats = "transparent",
			sidebars = "transparent"
		},
		transparent = true,
	}
}

My treesitter.lua (issue exists with/without treesitter):

return {
    'nvim-treesitter/nvim-treesitter',
    build = ':TSUpdate',
    event = { 'BufNewFile', 'BufReadPre' },
    highlight = { enable = true },
    indent = { enable = true },
    opts = {
        ensure_installed = {
            'bash',
            'csv',
            'dockerfile',
            'gitcommit',
            'gitignore',
            'gpg',
            'groovy',
            'hcl',
            'helm',
            'html',
            'json',
            'lua',
            'markdown',
            'markdown_inline',
            'python',
            'regex',
            'requirements',
            'ruby',
            'sql',
            'ssh_config',
            'terraform',
            'tmux',
            'toml',
            'vim',
            'vimdoc',
            'xml',
            'yaml',
        },
    },
}

[GNOMES]

    on_highlights = function(hl)
        hl.shAlias = { fg = "<hex code>" }
        hl.shVariable = { fg = "<hex code>" }
    end