LTween provide some handy functions for work:

VirtualCall- Register the start/update/complete events, set a duration time, so these events will execute:

DelayCall- Same as engine's native node "Delay": c++ version may be more valuable:

ULTweenBPLibrary::DelayCall(World, 2.0f, [](){
    ...(your function here)
});

DelayFrameCall- Delay a specific frame count and call event:

(DEPRECATED) RegisterUpdateEvent | UnregisterUpdateEvent- Register the "Update" event so it will be executed every frame, until unregistered.

UpdateCall- Call event every frame.

RepeatCall- Repeatly call function with given interval time: