@llg06 Have you tried to feed more often during the day?
If you feed during the day every 3 hours, and do a “dream feed” right before you go to bed (10-10:30 pm), baby might last longer.
I followed 12 hours sleep under 12 weeks and Taking Cara babies course and baby had only one feed at night until around 5-6 weeks, and then just kept doing “dream feed” and baby slept until 6:30-7 am.
In the taking Cara babies course, they say that many parents give a bottle or a boob when baby just needs a pacifier/swaddled or rocked.
The goal is to start dropping those feeds at night and give less and less food at night and more during the day.
My pediatrician said that at 8 weeks old they are developmentally ready to sleep 12 hours straight.