In most cases, yes. The skid plates are interchangeable between XX SL, XX, and X0 Eagle Transmission derailleurs. The outer parallelogram links are also replaceable and interchangeable between XX SL, XX, and X0 Transmission derailleurs.
GX Transmission uses a slightly different mounting bolt, skid plate, and outer link than X0, XX, and XX SL models, and these parts are not interchangeable. The Setup Key and cage assembly are interchangeable between all models of Eagle AXS Transmission.