Emails showing as Plain Text on Recipient IOS Devices

Emails showing as Plain Text on Recipient IOS Devices

I have set up workflows to trigger automated emails for my leads. The email contains an image banner at the top and the social media icons in my email signature are hyperlinked. On desktop and on Android mobile devices the email does not have any issues displaying. On IOS devices the emails are coming over as plain text causing the images to be links. Does anyone have a solution for this or is it an IOS issue that does not have a workaround?