The term "immediate mode UI" is about the API philosophy, not about how it works under the hood, and especially not how rendering is implemented (e.g. Dear ImGu

The term "immediate mode UI" is about the API philosophy, not about how it works under the hood, and especially not how rendering is implemented (e.g. Dear ImGui records a command list for the whole frame which is then passed to the API user for rendering, this is pretty much the opposite of an 'immediate mode renderer').