bug: italic option not work

Neovim version (nvim -v)

Vim 9.1.1707

Operating system/version

MacOS 15.0

Describe the bug

Comments not italic inside vim, but my terminal can render italic font.

Steps To Reproduce

1. setup nightfox
2. open vim

Expected Behavior

render italic correctly, and don't need source config twice.

Repro

lua << EOF
require('nightfox').setup({
    options = {
        styles = {
            comments = "italic",
            keywords = "bold",
            types = "italic,bold",
        }
    }
})

vim.command"colorscheme nightfox"
EOF