Manufacturers have lied about E2EE since the beginning. Some claim that having the key doesn't change that it's e2ee. Others claim that using https = e2ee, because it's encrypted from one end to the other, you see? (A recent example is Anker Eufy)

The point is that the dictionary definition of E2EE really doesn't matter. Being pedantic about it doesn't help. The only thing that matters is that the vendor describes what they call E2EE.