Editing HPs on NPCs

Is there a way to edit hit points of existing of an NPS in an existing AP Module. I'm running with a larger the avg gruip in would like to add more HP to my mobs to help with my challenge level. I'm a new GM to the FG format... long time roll20 gm making the jump. Im not a programer and all I can find involves coding. I've been unable to do this in either Starfinder or Pathfinder 2

Welcome to the FG forums!

You can absolutely change the base HP of an NPC in an AP or adventure. Unlock the record first - click the padlock icon in the top right of the NPC record.