According to the Shima Seiki history page: https://www.shimaseiki.com/company/dna/history/ it was a world first in 1995. That doesn't make it novel anymore in 2026.

I would nonetheless find it interesting to read an "ultimate guide" explaining how the knitting machines work, but this ain't it.

But the site doesn't say anything about being new, and in fact says it was invented in 1995:

  When Was 3D-Knitting Invented?

  The concept of 3D-knitting was first envisioned and then developed by the
  Japanese company SHIMA SEIKI. They launched their first WHOLEGARMENT knitting
  machine at the ITMA trade fair in 1995.