Anyone else still struggling with bedtime routine?

My boy is 9 weeks and keeps falling asleep earlier and earlier and missing our bedtime routines. When he was around 5 weeks he consistently fell asleep at around 9:30 so we started our routine at 8:30. Then he started falling asleep before 8:30 so we moved it up to 7:30. The past week or so he’s been unpredictable and falling asleep between 5-7.

The most frustrating part is that he sleeps for about 6 hours for the first stretch, which is amazing! But since he is falling asleep at 6pm he wakes up at 12 or 1 lol so I don’t usually sleep the long stretch. It’d be much better if he fell asleep at 8 or 9. And trying to keep him awake longer isn’t working, he’ll just fall asleep during tummy time or in his bouncy chair or in his play mat. We’ll be trying to play with him and show him a toy or a book and he just falls asleep and stays asleep lol.

Any advice? Anyone else struggling?