VCs tend to dislike manufacturing startups. It takes a lot of capital to get going, some time to get good yield & work out the early flaws, and there isn't much potential for a huge exit in 5-10 years.
I'm more surprised that the printer market hasn't followed the security camera market, with lots of cheap and open options on markets like AliExpress that ship with phone-home firmware.
Printers are far more precise devices than you'd think. Building a camera from off the shelf Sony image sensors, slapping it in a plastic shell with a small ARM or RISC-V MCU is way easier of a design challenge than building a functioning printer.
I'm more surprised that the printer market hasn't followed the security camera market, with lots of cheap and open options on markets like AliExpress that ship with phone-home firmware.