Reply To: The Side Menu disappeared by itself.

Hello,

01. Sorry to say your given login details are not working. Please make sure that the Maintenance mode option is disabled from Theme Settings -> Maintenance. If the issue remains, deactivate the plugins not related to the theme and check the issue.

02. These are product Categories. Navigate to Products > Categories > Edit Category > In the edit category page change the title and the icon.

Then, Navigate to Appearance > Menu > Edit Categories Menu > Expand menu item and Check the HTML Blocks and edit it.
https://xtemos.com/docs-topic/html-blocks-usage/

03. This is a demo image not the text. If you want to check the font family of any text, you can use the online tool to check it.
https://www.myfonts.com/pages/whatthefont

Best Regards.