The knitting thing just doesn't add up at all even if it's kind of clever. Why would you make it from bronze? Why don't you find orders of magnitude more of these made from wood? Why would someone want to be buried with a knitting jig?
Sewing, spinning, weaving, and knitting tools are fairly common grave goods to find in women's graves: spindle whorls, needle cases, bone beaters, etc. As far as wood vs. bronze, almost certainly survivorship bias. The only wooden objects that survive that long are those that have fallen in bogs, where the anoxic environment prevents rot. Normal wooden grave goods will have rotted away by now.