Talk to Pediatrician on Sleeping Issue

AoA, I hope all of you are in good health,

I have a question regarding my 21 month's old baby girl, she doesn't sleep through out the night, it is happening since she is 5 or 6 months old, She wakes up and cries (sometimes with closed eyes and sometimes with open eyes, she literally scream sometimes) and make continous sound with closed eyes in her mother's lap. We tried the OraMeal when she was 7 to 11 months old nothing worked, we have to take her out of the room to make her calm and we had to show her toys in another room and show her the morning view from our home door to make her calm, sometimes this trick do the work and sometimes it don't we are not able to identify the root cause.

She sleeps in the evening mostly from 4 PM to 6 PM or 5 PM to 7 PM.

Can someone please suggest, what can be the reason?