Well in case anyone else has this problem, I figured out an easy solution:
- Create an event trigger under the spawned actor in the sequence.
- Make sure to pass the actor as the target/parameter in the event settings.
- In the sequence event for the actor, do the change mesh logic. No need to touch level blueprint.
It was a lot easier than I expected after struggling to find a solution for weeks.
Just a warning that the whole find actors by tag/class does not work with spawned actors in a sequence.