Function get_delayed_events_route 

pub(crate) async fn get_delayed_events_route(
    __arg0: State<State>,
    body: Ruma<Request>,
) -> Result<Response>

GET /_matrix/client/unstable/org.matrix.msc4140/delayed_events

Lists the sender’s scheduled events (MSC4140).

The response takes the earlier shape, with delay and running_since, which existing clients read.