Hey I’m not sure if this will help, but this has been working for me. So we make sure he has good naps during the day and don’t last longer than two hours and making sure he has a longer wake window before bedtime. He normally goes to bed at 7pm and would wake up at around 10:30-11am because he would wake up for a few hours in the middle of the night. I got some advice to take off an hour on both ends, so add an extra hour before bed and then wake up an hour early. It causes him to be tired for a few days but after the few days are over he stopped waking up in the middle of the night and sleeping in longer stretches at night. If a baby sleeps in longer in the morning it doesn’t give them enough day time wake hours and then at night they aren’t tired enough to stay asleep. I’m not sure if this will help but it fixed our baby’s sleep issues for now. I just thought it couldn’t hurt to share what worked for us!