Also @Chiro, So would a Detroit: Become Human OC [counting as a Homunculus in this sense] be technologically okay even with the setting of Westeros? I've never watched Game of Thrones personally.
Maybe not technologically, I admit, which is why I originally changed technological androids into magical (or rather alchemical) homunculi. They still consist of biocomponents, but instead of being built on assembly lines, the biocomponents are grown in large alchemical vats, from where they are then taken out and and put together by hand to form a homunculus. Similar to putting pieces into a puzzle. These biocomponents are also more fleshy in nature, though clearly not human organs. Originally the Alchemists (the equivalent of Cyberlife) assembled the homunculi themselves, but later they hired smallfolk to work in the Homunculus Factory. Nowadays the factory is "automated" (That is, homunculi build other homunculi).
That plus this story is set over a thousand years after the GoT canon, so I think lack of technology isn't as much of a problem.