Use suda.vim for automatically dealing with such cases. Works with neovim as well.

I’ll also recommend adding the following to your init.lua or some config file because suda doesn’t play nicely with nvim -d or vimdiff.

-- Disable Suda in diff views
if not vim.api.nvim_win_get_option(0, 'diff') then
    vim.g.suda_smart_edit = 1
end

The vimscript version of the same would be:

" Disable Suda in diff views
if ! &diff
    let g:suda_smart_edit = 1
endif