Do you have a link refuting the Orthodox ADDED books from the RCC?
When was the scriptural canon closed for the Orthodox Churches?
The History of the Canon is a bit more complex and cannot be surmised in simple conclusion without the risk of losing critical details.
I include below a few links that I suggest should be read to get a more detailed view of the subject.
This link is in Romanian so I Google translated for you... if you find certain strange things like "canon egg" instead of Scriptural Canon ignore and go forward.
https://translate.google.com/transl...ipturi-vazute-punct-vedere-ortodox-70085.html
"In connection with the scriptural canon, we must also reveal a point where
there is a dissension between the Orthodox East and the West. It is about the attitude towards the "anaghinoscomena" books (good to read), which, although not part of the biblical canon, are still printed by Orthodox along with the canonical books, recognizing them as instructive and moral.
In its attitude to the Anagynosomena books of the Old Testament, Orthodoxy is on the line of the best patristic tradition.
It is known that the Synod of Laodiceea (360-375), in canon 59, makes a clear distinction between "canonical books" and "non-canonical books", so that in the next canon (60) it gives the list of canonical books (between which, it is true , there are also mentioned two books "good to read": Baruh and the Epistle of Jeremiah.
Saint Athanasius the Great, in his epistle of the year 367, confirmed by the Trulan Councils (692) and VII ecumenically (787) as the second canon of this Holy Father, divides the Old Testament books into three categories:
a) canonical books (between which he also counts the two non-canonical ones mentioned above).
b) non-canonical books, which he considers, along the lines of Tradition,
good to read.
c) apocryphal books.
The Synopsis of the Holy Scripture is also attributed to him, in which the same three groups of books appear, the non-canonical ones being called "controversial", antilegomena.
The same strict distinction between canonical and non-canonical books is made by St. Epiphany of Cyprus (+ 403), Leontiu de Byzantium, St. John of Damascus (+754), and in West Rufin by Aquileea (+ 411), Fer. Hieronymite (+ 420) to
In the West, however, a new railway line will be inaugurated. Augustine (+430), who counted among the canonical books and some letters from the group of the "good to read": Tobit, Judith, I and II Macabei, the wisdom of Jesus Sirah and the wisdom of Solomon, specifying at the end that "these are 44 books who have authority for the Old Testament.
The local African councils from Hippo (393) and Cartagina (397 and 419) confirm the list of canonical books as established by Fer. Augustin. This attitude will predominate in the West and will be definitively sanctioned in the Roman Catholic Church by a decision of the Tridentine Council (1546)."
https://www.ocf.net/the-old-testament-canon/
https://blogs.ancientfaith.com/orthodoxbridge/holy-traditions-importance-to-canon-formation/
"The significance of the patristic and biblical witness to the importance of traditioning process to canon formation is that they alter the framework of debate. The tension between an authoritative Scripture and an authoritative Church is no longer an issue. This is because both have a common source, the Apostles who were commissioned by Christ via the Great Commission.
The dichotomy underlying the canon formation debate – an authoritative listing versus a listing of authoritative books — becomes suspect. This tension apparently stem from the Protestant versus Catholic controversy of the 1500s. Defining the canon as an authoritative listing of books supports the Roman Catholic view that Scripture is authoritative because it has the backing of the Church. Defining the canon as a listing of authoritative books reflects the Protestant view that Scripture’s authority is independent of the church.
The Orthodox approach is to understand the biblical canon as an authoritative listing of authoritative books. The apostolic writings were authoritative because they were written by the apostles and the bishops were authoritative because they were the apostles’ successors and the guardian of Scripture. For Orthodoxy, Scripture and Church cannot be separated because they comprise one organic whole."
From these links I understood that although the Canon was "closed" in the Ancient Church there were certain ways that were interpreted different by some major Church Figures. St. Augustine took a bit later a different route than St. Athanasius of Alexandria established route. Orthodox went St. Athanasius way while Catholics went St. Augustine way in the interpretation of the canon.
Saint Athanasius:
http://www.newadvent.org/fathers/2806039.htm
I am not an expert in Canon but from what I read on the subject I support the Orthodox View, also because the fruits were good. The Books that remained in the Orthodox version did not give birth to heresy or anything bad. They are books "good for reading and spiritual development".