Hmmm… Not true. My example does that. In recent versions the folks at ue4 have added a number of nodes used to modify timelines this way. In my picture, I’m setting the play rate of the timeline on begin play using a duration float.
To clarify: When you create a timeline on ue4.18, it adds a component variable which can then be added to the event graph. When you pull from that variable, you get a bunch of useful timeline related goodies.

