Try to find an typical consumer inkjet printer on AliExpress, you won't find any, or if you do, it will be someone reselling the usual brands like HP or Canon. You will find label printers, industrial printers, 3D printers, thermal printers, and all sorts of weird stuff, but none of them able to put ink on a stack of A4 paper.
If the Chinese, who are known for being able to make knockoffs of everything are not able to make inkjet printers, this should tell you how hard it is.
It addition to the print head, reliable paper transport is also really hard. That problem is often sidestepped by using a paper roll or by printing one sheet at a time, as it is the case for the Openprinter.
Several Chinese companies have their own domestic laser printers, claiming of in-house components and development (Cumtenn, ZoneWin), and one company does inkjet printers in addition to lasers (Deli Printer).
https://www.delioa.com/products/a4-inkjet-printer/
ZoneWin, a laser printer company, made a clone of both HP LaserJet 1020 and LaserJet M1005, which reuse most of the original/compatible parts (Q2612A cartridge). They claim it's 100% domestic parts only.
https://www.rtmworld.com/news/new-chinese-made-printer-uses-...
No.
Per Google, most HP printers are made in China.
A more likely explanation has to do with the economics of ink jet printers. The ink sales are so profitable that HP and other manufacturers subsidize their printers. This leads to prices at or near cost.
Since Ali express vendors can't count on follow on ink sales, they can't compete on price. And competing on price is Ali express's reason for existence.
So, ink jet printer are harder to find on Ali express. At least, low end consumer focused ink jet printers.
Laser printers, which aren't subsidized are common