IGPAPI
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    Variable LoginTwoFactorChooseMethodInputSchemaConst

    LoginTwoFactorChooseMethodInputSchema: Struct<
        { ticket: optionalKey<brand<String, "TwoFactorApprovalTicket">> },
    > = ...

    What opening the picker may need: the approval ticket the screen below holds when the picker is reached by "Try another way". The step recomputes it from that screen's fresh state, so no ticket travels in the trail. When the picker is the login answer's own destination, the login already fetched its rows and left them as a process handoff (TwoFactorTickets.handOffPicker), and the input is empty; the picker's own values are issued by its answer either way.