not for the fireworks fro the MK but you can use the handicap area to view them. Just know depending on how many other people are in the area will determine how much space you ( he ) will have. I have some SPD and found it very helpful and just what I needed ( like no one directly confront of my view and no one some close to me they where touching me and a little room to stem )
I have only down Fantastic 2 maybe 3 times and either had a FP or just walked right in some never tried to use my
DAS for it
I was told no DAS for river of life at AK ( when it first opens so not sure if this is still the case.
HS fireworks did not have any accessible area last week
did not try at EPCOT but I would guess it would be the same as MK