I've tried numerous times to download the Ubuntu 22.04 iso file to both a Ubuntu 22.04 desktop and to a windows 10 notebook. The download begins normally but partway through it stops with the following message: "ubuntu-22.04.1-desktop-amd64.iso failed". I started the download from https://releases.ubuntu.com/22.04/ by clicking on the "64-bit PC (AMD64) desktop image" link. Am I missing something?
Try downloading with torrent. There the download would not fail even if the internet is bad.
You could try using another mirror
ps: When I use another mirror, I tend to verify the checksum still by downloading it from the main site and checking that.. but normal verify of ISO should be sufficient (ie. https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu#0)