Concerns re grandchild's diet.

Oh I should add when one of my grandaughters daddy died she ate nothing but noodles for a year she’s a very healthy and beautiful girl age 20 in her last year at uni now
Please do not worry

Can I just say my son would eat no vegetables except a tiny bit of carrot no fruit except bananas no cheese milk cream He loved Frosties or similar and ate meat
He is now in his fifties has been an athlete all his life running now in extreme Ironman races and has a body and apparently organs age much younger than his years He’s never smoked
Please don’t worry too much

As others say, probably nothing to worry about. But there is an eating disorder called 'Avoidant/Restrictive Food Intake Disorder (ARFID)'

Here is a link to a website that gives a very balanced overview of the subject and also has lots of sensible hints and tips - like getting the child to help prepare and cook food, they usually eat what they have prepared. eating-disorders.org.uk/information/avoidant-restrictive-eating-disorder/

DGS5 - aged 5 - eats chips, toast and pasta with cheese. He ate pizza the other day too.

He is bright, sparky and a brilliant footballer - or so he tells me!! His older brother and sister eat completely normally.

I am baffled by some grand parents stressing about their grandchildren. It's not really, generally, anything to do with the grandparents.

Never a good idea to get involved in parenting grandchildren, unless they are in your charge of course.

Don’t let the child see that his diet concerns you ,
not all children like vegetables or fruit
Some children can’t abide the texture of meat , it sometimes takes too much chewing
Fussing about what he eats or doesn’t eat makes things worse, if the rest of the family are eating different things and setting a good example he might come round to broadening his diet
It’s the parents job to oversee his meals , so go with them

Step back

His doctor will raise any concerns if any
and his parents will address this if worried

Different kids from same parents have different diets and degrees of pickiness

Sounds pretty normal to me. Cookies from a packet are sweeter than home made maybe this is why he prefers them.
Is his diet perhaps the only thing in his life he has some control over.

If he seems otherwise normal, then I'd just give him the usual vitamins; make sure fruit & veg are available, and leave him to it.
Very few toddlers like meat as such and many dislike vegetables. They grow out of it as long they get good opportunities to eat well, and they don't get much attention paid to their fussing.
However, 2 things make me wonder: he is very sensitive to smells, and he will only eat cookies from a packet. Your wording makes me think you are not in the UK, so I don't know how you would sensitively check his general development.
In the UK, I'd say ask nursery, or check with the Health Visitor.