[Solved] NO_PUBKEY A8580BDC82D3DC6C remains

Per (apt) Update fails no public key?
In /etc/apt/sources.list.d/brave-browser-release.list:

# Replacing:
deb [signed-by=/usr/share/keyrings/brave-browser-archive-keyring.gpg]
  https://brave-browser-apt-release.s3.brave.com/ stable main
# With:
deb [arch=amd64]
  https://brave-browser-apt-release.s3.brave.com/ stable main
# Or even just:
deb https://brave-browser-apt-release.s3.brave.com/ stable main

resolved the issue. Only the contents between ‘[’ and ‘]’ changed / was removed. [Trusting apt(-get) to only used signed repositories, regardless. (?)]

Could the page at Installing Brave on Linux #release-channel-installation be so updated, please?

It would save much time wastage and teeth-gnashing.

And, as above:

… could the page at Brave Signing Keys be updated to note the command to import the key?