No, no they don’t. Not by far. Google, for example, doesn’t - and even if they did, it wouldn’t be useful, as they don’t support dynamic client registration either, as they want lock-in. Being able to type in my email address into a generic widget and get the Google auth dialog is specifically what they don’t want.
Facebook has the same issue, as does Yahoo. I don’t think I know of a single implementer of OpenID Discovery and Dynamic Client Registration - the only purpose of OpenID Connect as deployed in the wild is to share development resources, not to create a system where people can type in their email address into a generic widget which works for every OpenID Connect supporting domain off the shelf with no RP-side configuration and get a login form.