Fixes on a PHP website - MVC framework (social media platform)

There is an issue happening on the mobile app of my website due to users' emails not getting verified because normally upon registration the verification emails are sent to the users' email addresses and the response from server says ''200'' which means ''OK Verified'' and even on the unverified emails it still says ''200'' which means 'OK'' from server but at the backend the email is not truly verified. For this reason the app is showing error. We have to make some changes about that at the backend (website server side) so the unverified email addresses will have different response like ''Email address not verified'' response. Server response for unverified email should not be 200 too. Secondly, I need to programme API for editing Chat, quote reply, chathead popup like in messenger, add reactions such as reply, likes, dislikes, hearts, love, emojis, smileys to photos/videos of users posted on status. And resolve issue with posted links on social media website not displaying thumbnail images and finally fix conflict on site that is linking our site to another site. This part will require minor frontend design tweaks.