16 week old feeding less

Hi everyone,

So my 16 week old baby girl has been feeding 5oz every 4 hours, the past few weeks she normally feed 6x a day so taking in about 30oz. (Last feeding at 10pm wakes up at 3am for another feeding) The past couple days she’s been sleeping longer at night. She’d go to sleep around 8:30 last feeding around 8pm and I end up just letting her sleep instead of dream feeding at 10pm. And she’d sleep until

About 4:30. So she’s missing out on 1 feeding bringing her feeding count to just 5x in 24 hrs meaning now she’s only feeding about 25 oz. is that okay? Or should I still wake her up in the middle of the night to get that 6th feeding? Thank you everyone.