The answer
While these can be checked for more detail, "Irenaeus on Heretics," "Tertullian on Marcion," and the "Muratorian Canon," are amongst the early church writings that commented on 1 John but did not stir up controversies regarding these verses from latter or contemporary church fathers. We can presume that whether they were included or omitted in the early years of the Church, the Church is satisfied with their placement within this context even until now.
Answered by His Eminence Metropolitan Youssef (opens in a new tab)