Hi,

Try to inherit function like below.

odoo.define( YOUR odoo.define PATH, function (require) {
'use strict';
const {
    registerInstancePatchModel,
    registerFieldPatchModel,
} = require('mail/static/src/model/model_core.js');
const { attr, one2one } = require('mail/static/src/model/model_field.js');
registerInstancePatchModel('mail.activity', YOUR odoo.define PATH, {
      async markAsDone ({attachments = [], feedback = false }) { 
            const attachmentIds = attachments.map (attachment => attachment.id); 
            await this .async (() => this .env.services.rpc ({ 
                model: 'mail.activity' , 
                method: 'action_feedback' , 
                args: [[ this .id]], 
                kwargs: { 
                    attachment_ids: attachmentIds, 
                    feedback , 
                }, 
            })); 
            this.thread.refresh ();
            location.reload(); 
            this.delete(); 
        }
});
});

Regards