Does you older child feels threatened too?
Its a tough concept to understand; especially from a gentle parenting prospective; but I’ve seen my son feel threatened by the baby and react in a way he’s sorry for later.
Especially when she wants to investigate his lego creations or his train tracks.
It’s a very normal human phenomenon, and honestly it’s something best left to be figured out by them, we do discourage the pushing and sadly sometimes biting too but other than these two safety issues, I let them figure out their issues.
I strongly believe they’ll understand each other better without my intervention in their play.