Installation problem related to key?

I’ve installed Brave successfully before, but on a new system it fails. I’ve followed the instructions, but get a message about GPG check. I’ve seen a code file https://brave.com/signing-keys/ which might be what it wants, and saved it in my Downloads directory as brave.pgp. Doesn’t work. Maybe the downloads page should say what to do with this file.

Downloading Packages:
[SKIPPED] brave-browser-1.27.111-1.x86_64.rpm: Already downloaded
[SKIPPED] brave-keyring-1.9-1.noarch.rpm: Already downloaded
[SKIPPED] at-3.1.23-6.fc34.x86_64.rpm: Already downloaded
[SKIPPED] liberation-fonts-2.1.3-2.fc34.noarch.rpm: Already downloaded
warning: /var/cache/dnf/brave-browser-rpm-release.s3.brave.com_x86_64_-d55d330619c02b48/packages/brave-browser-1.27.111-1.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 82d3dc6c: NOKEY
Public key for brave-browser-1.27.111-1.x86_64.rpm is not installed
Public key for brave-keyring-1.9-1.noarch.rpm is not installed
The downloaded packages were saved in cache until the next successful transaction.
You can remove cached packages by executing ‘dnf clean packages’.
Error: GPG check FAILED

I’ve found this page
https://community.brave.com/t/error-gpg-check-failed/104153/8
which suggests
sudo rpm --import https://brave-browser-rpm-release.s3.brave.com/brave-core.asc
It works on Fedora-34 and Brave Version 1.27.111 Chromium: 92.0.4515.131 (Official Build) (64-bit)