Hello,

01. Please deactivate all the 3rd party plugins and activate only theme-required plugins on the site and then check the issue. I am sure your issue will be solved. Then Activate the 3rd party plugins one by one and check which plugin is creating the issue for you.

02. Sorry to say, it is not possible to make it like this, Taking into consideration that mobile screen is limited in size, all the content is placed a block under the block.

Best Regards.