
Hi Rosemary Thompson,
Welcome to the Microsoft Community.
From your description, sorry to hear that you have experienced some issues.
Per your issue, it seems the hero web part on the mobile does not show as the same on the computer. If any misunderstanding, please feel free to correct me.
May I know whether this happens to both Android and iPhone? If so, could you please try with a test site in another template, and create the same hero web part to see whether the issue can be reproduced. As some features will display differently on the phone, so to narrow down the issue, please kindly try with a new template for the same web part.
Thanks for your patience and understanding. Should any uncertainties arise subsequently, please feel free to seek assistance once again.
Best regards, HungLa - MSFT | Microsoft Community Support Specialist