There are likely several that do parish work and don’t necessarily claim that as a “primary apostolate” as you termed it. For instance, there’s a Benedictine monastery nearby where the sisters frequently engage in parish work, but it’s not mentioned as part of their charism or major ministries. It is mentioned on their website, but almost as a passing remark. We also have Sisters of Providence in our area, and a fair number of them also do parish work - but it isn’t exactly “advertised” that they do; the parish work is how they carry out the ministries they’ve identified (and so you’ll have to read between the lines, so to speak, when you’re learning who they are and what they do).