Hello,
I have read the requirements you need for developing plugin klaviyo. I have been working on WordPress, CSS, HTML PHP, JavaScript and other elements which are needed for developing a website. As, I've been doing these for many years which certainly makes me proficient in WordPress, I can help you to fix these problems. If you give me the project, I will be able to deliver it within 60 days with precise work. The additional things regarding this project, we can discuss in the chat.
Thanks,
Shahidur