'Wangle" is a verb. It means to get someone to do something for you
using trickery or deceit. Your example sentence only makes sense if
you are asking someone to get you some Ding Dongs from someone
else by tricking or fooling them.
'wangle someone up" doesn't make much sense to me.
Your sentences contain minor grammatical errors which I've corrected:
Does this sentence "Can you wangle me up some Ding Dongs?" have a similar meaning to "Can I get some Ding Dongs" or "Could you get me some Ding Dongs?"
Is it okay if I say to a flight attendant "Could you wangle me up some Ding Dongs or some water?" rather than "Could you get me some Ding Dongs?".
Would you tell me exactly what "wangle someone up" means?