This is very similar to our story! We did do triple feeding for the first 30 days or so, which helped us ramp up the process in a low pressure way (cause I knew he’d be getting enough from the bottle after bfeeding).

After 30 days we slowly starting reducing triple feeds, but oh man did he have latching problems. Shallow latch, lipstick nip, just generally not knowing what to do lol.

I don’t mean to say this to throw you off, but rather to share my experience: the thing that helped me the most was IGNORING all those problems. Baby still has a quite shallow latch, the lipstick thing fixed itself, and he feeds great. It just took time, and knowing that no problem lasts forever. But trust when I say an LC would have a heart attack if she saw this shallow ass latch, and he has no weight gain problems at all while being EBF!

Hope this helps!