Since you do not need the timeline to drive multiple objects simultaneously, you can reuse it:
With this, you apply it to as many elements as you wish.
edit: you can use Select node for the Lerp data and use the timeline track as Alpha, of course. I’m doing a weird thing here to make it faster.
If you need the Timeline to drive several objects simultaneously, you should be able to achieve that by creating multiple tracks in the same Timeline and offset each track by the desired value. It’s not going to be pretty but beats 10 separate timelines for sure.