so i found something that may be of use, i literally just found it so i dont know a lot about it yet but check out use acceleration for paths in the character movement component if thats the movement your using. if you enable that option then you can use the use fixed braking distance for paths option and the fixed path braking distance. that should get your character to slow as it approaches the destination. i did some testing with a thirdpersonbp and some target points and it seemed to work.
