Does the online oyster history ever work?

IIRC, it says someone like it only works if you have purchased pay as
you go credit from Oyster online. So, I did that on Friday and got
the card updated on Saturday. Still no online history for Saturday or
Sunday. It shows the correct balence, just no history. I need this
for my expense reports.

On the Journey History page it says it normally takes 48 hours for journeys
to be added to your statement and that is reasonably accurate in my
experience. Or rather it takes up to 48 hours. For example it is already
showing a tram and tube journey I made yesterday morning, but it is yet to
show the return journey I made in the afternoon. On occasions I've had to
wait several days for some journeys to appear and some journeys have never
appeared at all, but on the whole they tend to appear in a couple of days.