By naming the modality specifically on the website and Google Business Profile, and by building referral relationships with the practitioners who see those clients. For prenatal work, doulas and midwives are usually the strongest single referral source.
Specialty work is where the best margins and the strongest referral relationships are, and it markets differently from general massage.
Specialty pages also rank considerably more easily than general massage pages, because the competition is thinner and the search intent is clearer.
Two or three specialty referral relationships can fill a substantial share of a solo calendar.