was Ephesians meant to be shared with other churches?
Yes, Ephesians was meant to be shared with other churches. The letter was sent to be circled among all the churches in the area around Ephesus. It likely reached Colossae, Troas, and possibly inland cities such as Antioch and Derbe. It was not lost but preserved.
Les explains that the letter to the Ephesians was not intended only for Ephesus. He says it probably went out to the other cities in that area, and he is sure it got to Colossae, probably up to Troas, and may even have gotten inland as far as Antioch and Derbe. He notes this letter especially was sent to be circled amongst all the churches in the area around Ephesus, and yet it never got lost. He finds it amazing that these letters were providentially preserved and kept intact for three hundred and some years before the Church Fathers put them into what we call the Scripture.