This long Warning is a multiple Configuration Thing. To solve that, open the Terminal and type:
sudo nano /etc/apt/sources.list.d/archive_uri-http_archive_ubuntu_com_ubuntu_-jammy.list
In the following Window go to Line 4 and sett a # at the Beginning of the Line. Then type ctrl+o to save the Change, Enter to confirm and ctrl+x to close. Then back in the normal Terminal make a sudo apt update
again and then it should runs without the Messages.
The Brave Thing is because Brave itself don't add a Value in the Description for adding there Repo. There is arch=amd64
missing. In the Link from @zenzen is explained what to do.