I would say it is likely that some Poles remained in Haiti in that era but it wasn't significant and far from being under the most honorable of conditions:The disastrous Haitian campaign
Combat casualties and tropical diseases, including the yellow fever, reduced the 5,280-strong Polish contingent to a few hundred survivors in the space of less than two years. Of the survivors, about 400 remained on the island, a few dozen were dispersed to the nearby islands or to the United States, and about 700 returned to France
en.wikipedia.org/wiki/Polish_Legions_(Napoleonic_period)#The_disastrous_Haitian_campaign1804 Haiti Massacre
In Haiti there still is a popular myth that many Polish soldiers became sympathetic to the former slaves' cause and deserted the French, supporting Jean-Jacques Dessalines in significant numbers, with entire units changing sides. In fact, the actual desertion rate was much lower; nonetheless about 150 Polish soldiers joined the Haitian rebels.