Woocomerce debugs

I need to solve the issue in API mobile because it needs to accelerate the response time
I need to solve the issue in the child theme
I need to solve the issue of performance checkout
I need to solve the issue of plugins
I need to solve the issue in the Mail server
I need to solve the issue in Cyberpanel
I need to fetch API mobile with the checkout page woocommerce
I need to solve CDN & catching issues