I too can see now some images are not loaded on an iPad.
In the iPad Developer Console I see this error:
The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 310.)
like:
GET https://davbal.com/wp-content/uploads/2020/07/bcc_keyimages_day_03-768x1152.jpg The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 310.)
Really not sure why this would happen.
You can try and disable lazy image loading in "lay options" → "lazy loading" section and see if that changes things