When it comes to expressing that someone is aware or attentive to something, there are plenty of synonyms you can use instead of "is mindful of." For instance, you could use "is conscious of," "takes into account," "acknowledges," "recognizes," "notices," "bears in mind," "keeps in view," "heeds," "attends to," or "pays attention to." All of these options can help you convey a similar meaning, but with subtle differences in nuance. Depending on the context, you might choose one synonym over another to emphasize a certain aspect of the awareness or attention in question, or to vary your writing style and tone.