Blog – cutting left side text off – help please

Hoping someone can help

I've published a number of blogs on a new site and when I'm editing on my computer and viewing on mobile format within the editor, it all looks good

But the live site, viewed on my Samsung phone and friends Apple has the left hand side cut off

Can anyone help me please

Using WordPress, theme YITH Wonder, standard blog template configuration, no changes made to CSS

Please help me