Should I let baby sleep longer?

Marisol

My baby girl just turned 4mos last week! She’s exclusively breastfed (don’t know if that matters for this question lol) At night I usually wake her up after about 6-7hrs of sleep to change and feed her. Should I be letting her sleep longer? She can definitely go longer since it takes me a few minutes to wake her but I don’t know why I’m afraid to let her go more than 7hrs without nursing at night 😅 She has her 4mo check up this Friday so I’ll be asking her ped but I wanted to know your opinions!