The temple of Khonsu (son of Amun and Mut) started to be built under the reign of Ramesses III in the precincts of the great Amun temple in Karnak1 completed by later rulers. Thus, amulets of the Theban triad are of Dynasty 21-22 onwards

Green glazed plaque of the Theban triad with a Bes head

Green glazed plaque with a Bes head H 4.6, W 2.8 D 1.0 Third Intermediate Period Dynasty 21-22 © 2018 Musée du Louvre/Christian Décamps #E 10775

Blue glazed plaque of the Theban triad, top broken

Blue glazed plaque top broken H 2.9, W 2.0 T 0.9 Third Intermediate Period © 2018 Musée du Louvre/Christian Décamps #AF 367

Blue glazed plaque of the Theban triad with a Bes head

Blue glazed plaque with a Bes head H 4.5, W 2.9 Third Intermediate Period? © 2013 Musée du Louvre/Antiquités égyptiennes #AF 9517

Reference

1Wilkinson R H. The complete gods and goddesses of ancient Egypt, Thames & Hudson, 2003, p. 114