I'm sure you've tried A to Z so I'm just gonna make a list of possibilities ✨️ -is it time to up the bottle nipple size? -do you use blackout curtains -do you turn off majority lights in home to make them drowsy/ 'Set the Tone' at 7pm -Have you tried 7pm bedtime or 9pm instead? -when do you wake with baby? Is it 4-6am? When waking I'd open black out curtains 3-4mo they are now becoming aware of day VS nignt!! This is why they recommend to 'sleep train' around 4-5mo -Is baby too cold/hot? -are you swaddling? -is there a sound machine for 12 hours at night? -is there any pest control box's In your basement or attic, these emit a high pitch tone we can't hear but babies can.
Do you put baby down & pat their bum or put them down drowsy but awake?
It could be witching hour. My toddler had that for a few weeks during that time.