In the third picture it does look as if Kermit's lower beak is out beyond the upper beak.
However, that may actually be helping him when it comes to cracking his seeds.
Keep an eye on it.
You should be able to find an exotic pet veterinarian with experience in dealing with small birds.
I'd recommend you do so and develop a relationship with that vet so you will have someone on whom you can rely for your budgies' check-ups and any medical needs.
Such a vet would be able to determine if/when the time comes that Kermit's lower beak needs to be filed down a bit.