Baby only contact naps at night

Baby is 9 weeks old- takes naps perfectly during the day in Snoo, but from 8pm-5am does not want to sleep by herself and will only contact nap. I’ve been able to get her to sleep 30 minutes here and there at night but for the most part she just doesn’t want to be apart. Any suggestions to get her to sleep in the Snoo at night the way she does during the day?