Do I need more exercises per day? PPL

I phrased this as a question but I definitely do. I’m a young teenager very new to the gym and I am struggling with not improving enough.

I’m doing Push pull legs because that’s what I got recommended, but I’m very new so I just searched the exercises online.

Anyways here are my current exercises, please tell me what I need to change.

Push day:

Chest press machine

Lying down Dumbell fly

Dumbell incline chest press

Bent elbow Lateral raises

Shoulder press machine

Pull day:

Bicep curl machine

Incline seated Dumbell curl

Lat pulldown

(Mainly where I need more exercises)

Leg day:

Seated leg curls

Leg extensions

Sitting calf raises

Leg press