Been playing LOTS of metroidvania games lately, and I keep looking for that charge up weapon attack ability in them all. How about that in Pathfinder 2nd ed?
Charge Up! FEAT 7
General Manipulate Skill
Prerequisite(s) expert in Athletics or Acrobatics
You build power into a single strike by further pulling the bow back or winding up even further for the strike. Increase the number of actions a single weapon strike uses and increase the damage from the single strike by one step. You may use this with other abilities you have beyond a basic melee or ranged attack.