I tried the following on this config with no luck.
sudo curl -fsSLo /usr/share/keyrings/brave-browser-nightly-archive-keyring.gpg https://brave-browser-apt-nightly.s3.brave.com/brave-browser-nightly-archive-keyring.gpg
echo “deb [signed-by=/usr/share/keyrings/brave-browser-nightly-archive-keyring.gpg] https://brave-browser-apt-nightly.s3.brave.com/ stable main”|sudo tee /etc/apt/sources.list.d/brave-browser-nightly.list
sudo apt update
sudo apt install brave-browser-nightly