7mo still doesn’t sleep through the night

Hi there. I’m a mother of 2 with 7.5 years in between my boys. My 7mo is giving me a run for my money and I do not know what to do. He still is not sleeping through the night. He goes down about 7:30-8pm and is awake at 6am. He takes 3 naps with 2.5-3 hour wake windows. Throughout