It's hard to tell for me from the picture as it's a bit dark. His face to me looks a bit pinker than it should. I have a nearly all white Pit Bull (Jack) who's underbelly and eyelids and even the top of his head is pinker and he sunburns too. Emma's face was pink like Chunk's is and it turned out to be she had a salmon oil sensitivity. Her pinkness was bad. A food change also recently has completely changed how her sweet face looked.
I don't think he's too pink, I believe heavy wrinkled faces are pinker than others . My Griz is pink most of the time too. After I clean him or he's been in the sun for a bit.
That whole picture has something of a pink tinge to it. Even in his shoulder region. So it really makes it look like it's the picture more than him that is pink.
Angry pink from food allergy has a different look to it than normal pink. We really need to see more pictures to try to help determine which he has.
To me he looks a little pinker than he should be, but it could just be he pic. As others have said some white bullies do look a little pink and that's normal. Some food allergies will make them pink too, but since he is still pretty young, I'd give it a little time and see if the pink lightens up.
I think he looks fine. I used to worry about Leroy being too pink as well but, then a vet told me that his coloring is totally normal and because he is a white dog the pink coloring would show up more. and it does appear to happen more when he is playing, over excited or hot. hth and I think your puppy is a cutie!