(FREE) Multi Task https://www.unrealengine.com/marketplace/multi-task
MultiTask enables multi-threading in Blueprints in the cleanest and the most efficient way.
One Latent Node, multiple branches.
Keep your blueprints simple with MultiTask.
MultiTask is now a reflection of the Pro version but limited in it’s functionality. There is no backwards compatibility with previous MultiTask Plugin. If you want the legacy plugin, you have to get the version for UE4.20
For a more professional version: MULTITASK PRO