4 months and sucking fingers

Diana

Son turned 4M today :)

What do you do about sucking hands.

During play, just lying there or whenever possible he does it.

It’s not the hunger suck warning.

I tried teethers both warm and cold and he pushes it aside for fingers.

I try Sophie the giraffe but he prefers to either stare or just hold it.

I let the sucking fingers during the night be (mainly thumb for night). I’m ok with it then because he soothes himself to sleep.

But in the day it’s jus to suck away.