These are my best approximation of the included tailpiece adapters that come with the Ubiquiti UniFi Protect Door Lock. There are two .stl files included, one for use with Schlage deadbolts (schlage.stl), and one for use with Kwikset deadbolts (kwikset_v2.stl).
If the V2 of the Kwikset adapter is too tight for your tailpiece, the original (kwikset.stl) has slightly looser tolerances.
Printed on a Prusa MINI with Hatchbox PLA, 0.25mm, 3 perimeters.
The author hasn't provided the model origin yet.