  Near-Earth asteroids (NEAs) are organized into five main classes: Amor,
Apollo, Aten, Atira and 'Ayl\'{o}'chaxnim. Asteroids belonging to the
'Ayl\'{o}'chaxnim class are located entirely within the orbit of Venus making
them difficult to detect by ground-based observatories. The first-known
asteroid of this class, (594913) 'Ayl\'{o}'chaxnim, was discovered by the
Zwicky Transient Facility (ZTF) in 2020 January during a twilight search for
asteroids at small solar elongations that ran between September 2019 and
January 2020. Due to its large diameter of $\sim$2 km, the discovery of
(594913) 'Ayl\'{o}'chaxnim is surprising because contemporary NEA population
models predict a scarcity of asteroids of this size located inside the orbit of
Venus. To compare the discovery of (594913) 'Ayl\'{o}'chaxnim by ZTF with the
predictions of NEA population models, we estimated the ZTF survey completeness
at detecting 'Ayl\'{o}'chaxnim asteroids and the number of 'Ayl\'{o}'chaxnim
asteroids expected to have been discovered by simulating observations of
synthetic 'Ayl\'{o}'chaxnim asteroids. We find that the 'Ayl\'{o}'chaxnim
population completeness of the survey is $\sim$18$\%$ and there is only a 5$\%$
probability that a single 'Ayl\'{o}'chaxnim asteroid would have been
discovered. Given the small chance for (594913) 'Ayl\'{o}'chaxnim to have been
discovered, its presence is either a statistical fluke or it implies that
asteroid population models may need to be revised.
