The low temperature of this star, ~ 3550K, would likely limit how the atmosphere would get ionized and ejected. This puts the weak peak in radiation into the IR band. The near UV energy (400 nm) is < 2% that of the Sun.
The report also seems to be saying that TESS, with its limited time schedule, is limited in detecting fast period planets. The range has a mean of only ~ 14 days, though about 36 days seems possible. This isn't going to catch many Earth-like planets, if I understand what is being stated.