  Recently, Biddle et al. (2024) claimed a non-detection of the protoplanet AB
Aurigae b in Keck/NIRC2 Pa$\beta$ imaging. I reprocess these newly-public data
and compare them to data from the extreme AO platform (SCExAO/CHARIS) used to
discover AB Aur b. AB Aur b is decisively imaged with SCExAO/CHARIS at
wavelengths covering Pa$\beta$. The Biddle et al. non detection of AB Aur b
results from a far poorer image quality that is non competitive with
SCExAO/CHARIS. Their contrast limits and thus constraints on accretion are
overestimated due to an inaccurate AB Aur b source model. Consequentially, the
revised Pa$\beta$ 2-$\sigma$ upper limit from these data is about three times
higher than previously reported. Irrespective of image quality, single-band
Pa$\beta$ imaging is ill suited to conclusively identifying accretion onto AB
Aur b. Instead, high-resolution H$\alpha$ spectroscopy may provide accretion
signatures. Aside from PDS 70, AB Aurigae remains the system with the strongest
evidence for having a directly-imaged protoplanet.
