I think you misunderstood the purpose of "spawnable". This is a feature that allows objects to be bound to specific sequencers, unrelated to animating. So, when you convert an object to a Spawnable, it will only appear in that specific sequencer. When you switch to another sequencer, it won't appear. This is done because different shot may require different lighting setups. If you simply animate them all in one sequencer, your outliner will be a mess! Moreover, lights will affect each other, which is not a good workflow for scene management!

@@pohsianghsu9302 Thank you 😁 Yes, I am totally new in UE and just got used to the interface and some basic renders and scene setups. Thank you for the tip! Subscribed and look forward to more of your tips :)