What page are you looking at, exactly? If you are looking at http://cdimage.ubuntu.com/releases/20.04.2/release/ then http://cdimage.ubuntu.com/releases/20.04.2/release/SHA256SUMS is linked from that page.
What page are you looking at, exactly? If you are looking at http:// cdimage. ubuntu. com/releases/ 20.04.2/ release/ then http:// cdimage. ubuntu. com/releases/ 20.04.2/ release/ SHA256SUMS is linked from that page.