apologies that your original topic slipped through our system.
Select the Headline Block, in the settings sidebar select the Mobile Tab, in the Headlines Tool bar ( which may now be located at the top ) you can change the alignment, and it will apply to Mobile, see here:
You will need to change the Text Blocks to a Headline Block, in the headline block settings ( sidebar ) you can set the Element to Paragraph. Then you can control the Mobile responsive alignment.
Just a note: Headline Block has responsive controls, and is great for setting Paragraph text in this type of design… but we don’t recommend using Headline for writing entire Pages / Posts of content – we can always help with some CSS for aligning that kinda thing 🙂