the information isn't hidden. NBN provides it to their customers in a regular manner - you need to internalise that you're not NBN's customer. if your RSP isn't providing it to you as their customer, that's a failing on their part. why aren't you asking them why they aren't doing their job? you do realise that planned maintenance is communicated to the RSPs in precisely the same manner as unplanned outages, yeah? construction is totally different, because by definition therefore there cannot be any services yet, so there is no RSP. so the public website provides a general advice for anyone living in the area. you don't call NBN though. they're a wholesaler. if you do, they will tell you to do what you should have done in the first place, which is to call your RSP. that's not hiding or anything like it, it's called having areas of responsibility. that's how the wholesaler/retailer/end user relationship chain works and always has worked, for quite literally decades now.