There are some great patterns for electric looms available specifically to make really old weaves. That’s basically a super modern way to do something medieval. Similar pattern exist for embroidery machines, since old-timey embroidery is generally not a thing modern machines do (well).

I’m sure there’s similar things available for a knitting machine

If you want to do modern loam, you’re basically buying laboratory-made, specifically mixed loam. It’s very hightech really, compared to “guy walking through field to spot OK-ish loam”.