Please clarify your question about the New Testament apocrypha being extra books of the Bible.

The term Apocrypha, in reference to the Bible has two different meanings depending on use by Catholic or Protestant churches.

Protestant churches normally use the term to refer to the Old Testament books of Tobit, Judith, Wisdom, Sirach, Baruch, Maccabees 1 and Maccabees 2, and parts of Esther and Daniel. These books were subject to revision and removal from the Jewish canon by the Pharisees resident in Palestine by about the first century after Christ. The Catholic church continues to follow the Alexandrine (Greek/Roman) canon and includes these books.

At the time of the Reformation, Martin Luther disputed these Old Testament books and they are not included in Protestant versions of the Old Testament.

Luther also rejected some books from the New Testament; Hebrews, James, Jude, and the Apocalypse, however they are accepted by later Protestants.

Catholic, Orthodox and Protestant churches all agree on the content of the New Testament. There are no "extra" books in the New Testament.

When Catholics use the term Apocrypha they are referring mainly to books rejected as non-biblical by the Council of Hippo, generally treating of incidents and events in the life of Christ not related in the Bible. They may be read for historical information but are not canonical and are not considered to be part of the New Testament by Catholic, Orthodox, or Protestant churches.

Which "Apocrypha" are you inquiring about?