Can we animated Sequencer using another Sequencer module?
I think this called nested animation, this can help when doing a lot of animations in number of Sequencers modules and we need to control these animations in master Sequencers.
https://youtu.be/0BoCkZLw6UI?t=268
And Also this can help in creating state transition animation
https://docs.vizrt.com/viz-artist-guide/3.3/transition_logic_identifying_states.html
Yes, you can.
Just add a "Sequence Trigger" type node to the master Sequencer.
The output of the "Sequence Trigger" is a trigger that you can use to start the animation (or do other operations) of another sequencer.