Get the Get Player Camera Manager node, drag out of it’s blue pin, release it on an empty space, search for “View Pitch Max” on the menu that pops up, select the Set type node, do the same for the view pitch min, and set them to your desired values.
You don’t need to trigger these nodes continuously after your IA’s, just after Begin Play. And you could also do this inside the character blueprint, but it’d be neater to implement this inside the player controller in my opinion.
Hope this helps! 