Hello,
Our theme does call any additional styles or scripts for the wp-admin, we improved lazy loading and forget to disable it for the admin but fixed it in 8.0.1 version as you can see, so any other requests. So, don’t have any idea why this is slow for you.
Frontent speed score is ok https://gtmetrix.com/reports/cosmeticplanetpk.com/RsWSP1xy/
Try to use CDN to speed it up.
Regards