How did the Ethiopian church come to have different books of Maccabees than the Catholic and Eastern Orthodox churches?

In the Ethiopian Tewahedo Church's Old Testament canon, they include three books of Maccabees , which are unrelated to the three Greek books of Maccabees in the Eastern Orthodox OT canon (two of which are in the Catholic canon). I'm curious how this situation came about. Are there ancient or pre-modern sources which note the difference? Wikipedia floats a hypothesis that the Ethiopian Maccabees were composed in the late medieval period. Is there good evidence for this? Why would someone create these books and put them in the canon?