Will SSDI recipients receive the Coronavirus emergency stimulus package of $1000?
Currently the $1000 is only a proposal, there is no law yet giving any kind of cash grants to anyone. Since your income is already guaranteed by the government, it's highly likely that you won't be included. The proposals being made generally talk about giving cash grants to folks with earned income, which if you had would prevent you from getting SSDI in the first place.
There is no clear answer to this question yet.