1) Provide us with FTP access to your site to check the issue in more detail
2) Just translate it in the AMP XStore translation files https://prnt.sc/18yz8ta
3) Could you, please, provide us with the screenshots for a better understanding? Or even better add our email (8themes@gmail.com) to the list of the developers in your search console to allow us to check the mentioned issues in more detail.
4) You can enable the My account icon using Mobile panel https://prnt.sc/18z0l75 or create a separate menu with my account link and choose this menu in the settings https://prnt.sc/18z12by
5) Use the drop-down settings to change the space https://prnt.sc/18z1yz5
To add the border use the below code
