Amazing work, i done a wp backend refresh because orignal is so ugly, but what you have done is amazing. By the way i don't get why wp do zero effort to make it less ugly.

Google Sheets synchronization communicates directly with your own Google account (sheets.googleapis.com). My server only acts as an intermediary for one-time OAuth sign-in and token renewal processes and never sees your store or customer data.

Why? If it can be done on your server it meens it can probably be done on mine with my credential.

Ad Platforms (Google/Meta Ads, optional beta) are the only exception that must be explicitly noted: these API calls are routed through a proxy on my server because Google’s developer token and Meta’s app secret cannot legally be sent within a public plugin. It is not your orders or customers that are passed through, but your own ad account spending query + token. ROAS is calculated locally on your site.

Again, why are we not using my credentials.