To find out if the "PrimaValue PLA+ (PLA+ LECTURE, 1320 g, Blue)" thread is compatible with the Bambu Lab AMS p1S, you need to check the specifications of the thread and the AMS. The PrimaValue PLA+ thread has a diameter of 1.75 mm, which is compatible with the AMS. However, PrimaValue PLA+ spools are made of cardboard, and the AMS recommends using plastic spools for better compatibility. You may need an adapter to use a cardboard spool with the AMS.