I am one of the developers of ContainerSSH, an highly customizable SSH server that launches containers.
One of the features we were thinking of developing is OAuth/OIDC authentication using the keyboard-interactive method. We would use the challenge prompt to direct the user to a website to perform authentication, then return with a code to finish the login process.
WinSCP, thankfully, supports keyboard-interactive already:
However, the challenge text cannot be copied, nor clicked. Our feature request would be to make this text copyable, or "linkify" URLs in the challenge text.