All these answers are very interesting. It does look like 'low fantasy' actually has several meanings.
I like the idea of calling OP's story 'pseudo-historical' in the sense that it says very straightforwardly what to expect: realism, but in slightly altered way. (However, I'm not sure if it's the case in English, but the "pseudo-" prefix sounds a little bit derogatory to me).
Now, (sorry OP for introducing my own problem), in my case I have a world that somewhat resemble ancient Mediterranean civilizations, mostly realist but not historically or culturally accurate, with small incursions of fantasy such as fantasy animals (but realistic in a biological/ecosystemic point of view = animals that could exist), possible healing magic (but stays open to other interpretations), presence of divinities in a quite material way (but this is only fantasy because no readers believe in my set of divinities), so yes, I think I'm always on the edge between realism and fantasy. What would you all call that in comic vocabulary, and do you think I can keep it under the fantasy tag?