I use neovim with tmux in alacritty and I'm currently tring to create keymaps to the combinations <C-S-h> and <C-S-l> (<S-h> and <S-l> are already mapped), but I can't get it to work when running tmux.
I've already followed this tutorial, but it only works outside of tmux. Is there some extra tmux configuration that I need to do in order to make this work?