If it is actually working and you can see it in the model then it is either in the loaded library (check the library manager for the path) or the embedded library in which case it is part of the Archicad job file.
Barry.
One of the forum moderators. Versions 6.5 to 27 i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11