How to achieve a low-key implementation of fantastical elements that don't end up making the setting feel half-baked)
I've been deliberating the technological level of the place my story is set in for a while now. Originally I wanted it to just be regular steam-based technology (like what would have been available ~1750 in our world, just in a fantasy setting), but now I've decided that it'd be really fitting for one of my POV characters to have an advanced prosthetic hand (because it makes sense thematically and is also just cool as shit). Obviously that is far out of the realm of what's possible with steam-based technology in out world, so I've been toying with the idea of leaning a bit more into steampunk. It'd also make sense for steam-technology to advance in my setting beyond what it did in out world since it's set in a very isolated place with limited resources, so properly making use of electricity would probably not be possible, so leaning harder into steampunk does come pretty naturally to my setting.
But now my dilemma is that I don't want to lean too hard into the usual steampunk aesthetic and I also don't want it to be too high tech. More along the lines of "there is advanced steam-based technology, but mass producing anything that's a lot crazier than our world is impossible". I just fear that, just in terms of the setting, it'll come out feeling like a half-baked steampunk story that neither appeals to steampunk fans nor fantasy fans.
Do you have any tips for writing settings that have a more subtle/low-key implementation of their fantastical elements? Settings where the fantastical things don't immediately jump out at you and hit you in the face, but whenever you do catch a glimpse of them it's absolutely awesome. And, ideally, do you have any recommendations for novels that do this sort of thing really well? After all, reading a good novel that fits what I want to do will probably be the best teacher.