Debian Server ISO download

Hello Debian Project Team, I am writing this email because I have a specific question concerning the Debian operating system. I am aware of the existence of an official Debian Live Server image, which I understand is created by the Debian Community. For instance, a friend of mine successfully installed a version on a Raspberry Pi 3 B+. I have searched various websites, including the official Debian site (debian.org), but I have been unable to locate this specific image. My question is twofold: Does an official Debian Server installation image, specifically in a Live ISO format, exist? If the answer is yes, where can I find the official download link? Thank you for your time and attention to this matter. I look forward to your prompt and helpful reply. Sincerely, Claudio Vicario