Mouth always open with tip of tongue sticking out

Since my Son was born I noticed he never closes his mouth.. it’s always kind of open like his tongue is almost to big for his mouth..? What do you think is this normal or is his tongue big? This even happens when he sleeps

That’s his tongue when he’s trying to get pacifier

But this is his mouth all the time..

I know it’s weird and random but I’ve never really seen another baby have this problem..

He has a doctors appointment on Wednesday so I will ask then but I still want to know what you guys think