Unable to download nuuchahnulth keyboard

I’ve been trying to download the nuuchahnulth keyboard from the link below. I have the option to switch between English, ditidaht, and nuuchahnulth but there are no special characters. Is there another place I can download the right keyboard?

There was no link in your post. Is this the link you meant?

# Nuu-chah-nulth keyboard

This is the link to the keyboard help that shows how to type the special characters.
Nuučaan̓uł Keyboard Help