Hi! I am confused. I set my items like my monomates and telepipe to my sub-palete but they're not showing up on the bar. I can cast Resta but that's not really too efficient if my PP runs out. I set my normal attack and my techniques to the weapon pallet but the sub-palete is showing empty.

You want to make sure you are on the right sub-pallet. Same way to change weapons but in that screen press left or right for sub-pallet. For sub-pallet you should have 3 bars.