Help please

I’ve breastfed before but haven’t EBF this long. I usually have introduced a bottle by now. My baby is 9 months and i noticed I don’t feel my letdown anymore. And my daughter seems happy throughout the day but she doesn’t seem to be peeing as much. She does have wet diapers but not as many as she did. It seems like ever since we cut out our night time feeding I’ve noticed all these changes. Is this normal? Should I still have a letdown reflex? She’s also gained two pounds since her last appointment at 6 months.