[DND5E] [PF2E] how to change XP trashhold?

Hello everyone.

Pretty simple, I need to change the threshold for XP where characters level up, the basic dnd system follows the classic 300 ->900 -> 2700 etc, but my group has elected to use different numbers for our progressin (xp is attached to story points, but we want the feeling of progression and knowing how long until next level etc)

I checked and saw some people using old modules and scripts that are some years old. im using v13 updated, and i cant code to save my life, does anyone has a solution?