Normally it should show quite soon, possibly even tomorrow. It's probably just waiting for the engineer reports of work completed today.
However it is very likely the broadband information given for it will be wrong. It seems that it usually shows the information for the address if was used at before. In most cases that takes a couple of days to update.
As long as it is decent estimates then you will be able to order BB, but don't be surprised if it isn't far better or far worse soon after. What I mean is don't get too happy if it is very good in case it isn't.
If it is a poor estimate some ISPs won't take the order. Don't panic. The worse it is the more likely it will improve.
Very occasionally it can stay wrong for ages.

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