As I said in that very post you quoted. The event happened on April 8, Mdme Duvalier posted her criticism on X regarding the silence of the Haitian government in April 9 and the Haitian government emitted a mention in April 10, after Mdme Duvalier’s post. By the time the Haitian government said anything the DR had already received multiple condolences from countries that are further away. During the 2010 earthquake the DR was the first to help given the geographic closeness.
The question should be why you simply ignored that part that the Haitian government reacted after the ex-Haitian First Lady criticism, which is very clear in that post, and precipitated to basically saying nothing.