How to make coc-clangd use c++20 in neovim?

I’m having issues with using c++20 standard in my neovim. I’m using coc-clangd but everytime I write C++20 specific code, I get an error. How do I fix this? I’ve already read ([How to make clangd use C++20 standard in my vim?]) but having hard time configuring it.Screenshot from 2021-10-17 21-28-38

I’ve also attached the relevant screenshot.