EDIT POST: [:$]
Thanks for taking a look at the layout, will fix that now
As mentioned, that layout does have a reversng section, but not were it was described as - it’s hard to tell from the online picture which are turnouts and which are one track crossing over another so it’s an easy mistake to make.
I hope this isn’t breaking any rules, but here’s a picture of that layout plan that someone posted on another forum:
The section of track between turnouts 2 and 5 is what actually creates the reversing section, but Atlas denotes the inside track between turnouts 4 and 5 as the reversing section. The reason for this is, I suspect, to make the reversing section longer. You could just leave out the track between 2 and 5 and you wouldn’t have any reversing section. The only thing I see that it adds is the ability for a train to leave the yard and then later arrive back at that yard facing the other direction.