There’s a big difference between the gospels not being cited by name directly, and not having a name. For example, the Gospels often cite Isaiah without using his name - just lifting direct quotes.

And there’re allusions to apostolic naming in things like Justin Martyr’s first apology, Ch67 (155CE, dating largely from it being co-addressed to Marcus Aurelius):

“ the memoirs of the apostles or the writings of the prophets are read, as long as time permit”

https://www.ccel.org/ccel/schaff/anf01.viii.ii.lxvii.html