Shows a little panel to mute shape keys matching a specific filter. Mutes all if no filter set. Made with the help of ChatGPT because my Python sucks!

MuteShapeKeysWithFiltering.py

bl_info = {
    "name": "Mute/Unmute Shapekeys",
    "author": "Fab3DX, Nabesaka, ChatGPT",
    "version": (1, 0),
    "blender": (3, 40, 0),
    "location": "View3D > Tools > Mute/Unmute Shapekeys",
    "description": "Mute and unmute shapekeys on the selected object",
    "warning": "",
    "category": "Object"
}

import bpy

PROPS = [
    ('filter', bpy.props.StringProperty(name='Filter', default='')),
]

def shapekey_visibility(context, value, filter=''):
    if context.active_object:
        obj = context.active_object
        if obj.data.shape_keys:
            for shape_key in obj.data.shape_keys.key_blocks:
                if filter == "" :
                    shape_key.mute = value
                else :
                    if filter not in shape_key.name:
                        shape_key.mute = value
        else:
            self.report({'ERROR'}, "The active object has no shapekeys.")
            return {'CANCELLED'}
    else:
        self.report({'ERROR'}, "Please select an object before running the script.")
        return {'CANCELLED'}
    return {'FINISHED'}

class MUTE_OT_mute_shapekeys(bpy.types.Operator):
    """Mutes all shapekeys on the active object"""
    bl_idname = "object.mute_shapekeys"
    bl_label = "Mute Shapekeys"

    def execute(self, context):
        result = shapekey_visibility(context, True, context.scene.filter)
        return result
    
class UNMUTE_OT_unmute_shapekeys(bpy.types.Operator):
    """Unmutes all shapekeys on the active object"""
    bl_idname = "object.unmute_shapekeys"
    bl_label = "Unmute Shapekeys"

    def execute(self, context):
        result = shapekey_visibility(context, False, context.scene.filter)
        return result

class MuteUnmuteShapeKeysPanel(bpy.types.Panel):
    """Creates a panel in the 3D View tools panel"""
    bl_label = "Mute & Unmute Shape Keys"
    bl_idname = "VIEW3D_PT_Mute_Unmute_Shapekeys"
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'
    bl_category = "Tools"
    
    def draw(self, context):
        col = self.layout.column()
        for(prop_name, _) in PROPS:
            row = col.row()
            row.prop(context.scene, prop_name)
                 
        col.operator("object.mute_shapekeys", text="Mute Shapekeys")
        col.operator("object.unmute_shapekeys", text="UnMute Shapekeys")


CLASSES = [
    MUTE_OT_mute_shapekeys,
    UNMUTE_OT_unmute_shapekeys,
    MuteUnmuteShapeKeysPanel,
]

def register():
    for (prop_name, prop_value) in PROPS:
        setattr(bpy.types.Scene, prop_name, prop_value)
        
    for cls in CLASSES:
        bpy.utils.register_class(cls)

def unregister():
    for (prop_name, _) in PROPS:
        delattr(bpy.types.Scene, prop_name)
        
    for cls in CLASSES:
        bpy.utils.unregister_class(cls)

if __name__ == '__main__':
    register()