Every survivor has the freedom to choose how, when, and in what detail, they want to share their story. You can ask for more, but you also have to respect the survivor’s choice to not answer. They don’t owe you that. The only time it’s really even appropriate to press for details if you’re a criminal prosecutor trying to help the survivor bring the abuser to justice.
Outside of that very specific situation? No, we don’t owe you anything. You can support a survivor without knowing all the details. In fact, respecting their boundaries around what they decide to share, is one great way to support them in their healing. They’ve already had too many people not respect their boundaries.