Can I use one timeline for multiple sprites?

Hi. I tried to create a relative timeline for a small animation but it seems you can only use it for existing sprites (not created at runtime) and only for fixed instances.

Is there no way to create a relative animation like increasing size and changing opacity and apply it to multiple sprites? And do I need one extra timeline for each sprite if they should not animate at the same time?

And is there a way to copy/duplicate the values if you have to have a timeline for each sprite separately?

You can set a timeline's result mode to "relative", and use the Timeline plugin's "Set instance" action to play a timeline with a different instance.