Beginner looking for assistance

I have made a rig that will have a functioning panel. The problem is that it’s not as I want it to be.
So I’ve grabbed some pieces off the web and templates form riggify. I don’t understand it most of it but the sliders in the upper part should be sensitive to what bone is selected, Like in the lower section. BUT I have only got it to work with one bone. I want to use an array with about 5 bones, and when one of them is selected the section should appear. In the second one I have the code that is selection sensitive.
How do I do it if I want it to have the panel properties to be able to be visible for multiple bones. I’m thinking arrays, but I don’t know … :spin:

import bpy

rig_name = "test_rig"

class MinecraftRigProperties(bpy.types.Panel):
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_label = "Rig Menu"
    def poll(self, context):
            return ("rig_name") == rig_name)
        except (AttributeError, KeyError, TypeError):
            return False

    def draw(self, context):
        layout = self.layout        
        col = layout.column()
        pose_bones = context.active_object.pose.bones
        col.label(text="Arm IK Switches")
        col.prop(pose_bones["root"], '["ik/fk_arm.L"]', text="IK/FK Left Arm", slider=True)
        col.prop(pose_bones["root"], '["ik/fk_arm.R"]', text="IK/FK Right Arm", slider=True)
        col.label(text="Arm Stretching (IK Only)")
        col.prop(pose_bones["root"], '["stretch_arm.L"]', text="Stretch Left Arm", slider=True)
        col.prop(pose_bones["root"], '["stretch_arm.R"]', text="Stretch Right Arm", slider=True)
        col.prop(pose_bones["root"], '["ik/fk_leg.L"]', text="IK/FK Left Leg", slider=True)
        col.prop(pose_bones["root"], '["ik/fk_leg.R"]', text="IK/FK Right Leg", slider=True)
        col.prop(pose_bones["root"], '["subsurf"]', text="Subsurf", toggle=True)

        col.label(text="- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -")

The part with sensitive props.

            selected_bones = [ for bone in context.selected_pose_bones]
            selected_bones += []
        except (AttributeError, TypeError):

        def is_selected(names):
            # Returns whether any of the named bones are selected.
            if type(names) == list:
                for name in names:
                    if name in selected_bones:
                        return True
            elif names in selected_bones:
                return True
            return False
        #IK Switches  
        ik_foot_right = "CTRL_IK_leg.L"
        if is_selected([ik_foot_right]):
            col.prop(pose_bones["root"], '["ik/fk_leg.L"]', text="IK/FK Leg Right", slider=True)
        ik_foot_right = "CTRL_IK_leg.R"
        if is_selected([ik_foot_right]):
            col.prop(pose_bones["root"], '["ik/fk_leg.R"]', text="IK/FK Lega Left", slider=True)

def register():

def unregister():

if __name__ == "__main__":
    register() to only be shown