Without physically evaluating her I can't be sure if this is a «preferred position» for her (i.e. if she already has underlying muscular or skeletal asymmetries) but too much time in this position will likely lead to shortened muscles
on the right
side of her
body (your left when you're looking at her), which can then make it harder for her to use her right hand, to lift her head in Tummy Time, to turn to see objects
on her right
side, to turn toward sounds or touch sensations
on her right
side, to roll, to use both arms
equally to assume the hands and knees position for crawling, to sit upright.