How to use iPhone mirroring apps on MacBook

It is such an amazing idea to have a special app on macbook device to mirror app but i noticed two important bugs, first what is the point of flipping the pages. I need to click on shared links or download picture or copy contents from app like whatsapp, telegram..... etc

Second, why i can not extend the size of the mobile mirroring app

I believe also, it should have intergration between macbook and mobile mirroring application.

lastly, why i can not drag and drop stuff between the app and macos.

[Re-Titled by Moderator]