I make it work also in UE 5.5. You can use a cloner type mesh or line. You just need to enter the number of objects in the count field. The only problem when using Line cloner mode, is that to get the offset of the objects you need to find the right number for spacing. Also you can use the step mode, but then i am having problem with scale, as i understand particles cant have a negative value?! or there is a way to make it negative?