Catholic Encyclopedia to the rescue again! Here’s a quote from their article on the Apostolic Canons:
“They deal mostly with the office and duties of a Christian bishop, the qualifications and conduct of the clergy, the religious life of the Christian flock (abstinence, fasting), its external administration (excommunucation, synods, relations with pagans and Jews), the sacraments (Baptism, Eucharist, Marriage); in a word, they are a handy summary of the statutory legislation of the primitive Church. The last of these decrees contains a very important list or canon of the Holy Scripture (see CANON OF THE HOLY SCRIPTURES under sub-title Canon of the New Testament). In the original Greek text they claim to be the very legislation of the Apostles themselves, at least as promulgated by their great disciple, Clement. Nevertheless, though a venerable mirror of ancient Christian life and blameless in doctrine, their claim to genuine Apostolic origin is quite false and untenable. Some, like Beveridge and Hefele, believe that they were originally drawn up about the end of the second or the beginning of the third century. Most modern critics agree that they could not have been composed before the Council of Antioch (341), some twenty of whose canons they quote; nor even before the latter end of the fourth century, since they are certainly posterior to the Apostolic Constitutions. Von Funk, admittedly a foremost authority on the latter and all similar early canonical texts, locates the composition of the Apostolic Canons in the fifth century, near the year 400. Thereby he approaches the opinion of his scholarly predecessor, Drey, the first among modern writers to study profoundly these ancient canons; he distinguished two editions of them, a shorter one (fifty) about the middle of the fifth century, and a longer one (eighty-five) early in the sixth century. Von Funk admits but one edition. They were certainly current in the Eastern Church in the first quarter of the sixth century, for in about 520 Severus of Antioch quotes canons 21-23 [E. W. Brooks, “Select Letters of Severus of Antioch”, London, 1904 (Syriac text), I, 463-64. For various opinions concerning the date of composition see F. Nau, in Dict. de théol. cath., II, 1607-8, and the new Fr. tr. of Hefele’s “History of the Councils”, Paris, 1907, 1206-11]. The home of the author seems to be Syria. He makes use of the Syro-Macedonian calendar (can. 26), borrows very largely from a Syrian council (Antioch, 341), and according to Von Funk is identical with the compiler or interpolator of the Apostolic Constitutions, who was certainly a Syrian (Die apostol. Konstitutionen, 204-5).”
Thus, the Canons were not written by the Apostles, they were forgeries. And since II Nicaea only approves the documents of “the Apostles worthy of all praise”, not documents falsely attributed to them, II Nicaea did not promulgate the false Scriptural canon of the 85th Apostolic Canon.
