I am noticing that my emails do not appear correctly in mobile devices or in regular email platforms such as Yahoo on a desktop.

I contacted Woocommerce for support and this is what they said.

(((Howdy Tasha,

Thanks for contacting WooCommerce support!

I notice two things here.

There is a product image column in the email. This is not the default behavior of WooCommerce.
The system status report attached here indicates that there are email template overrides in place. I suspect that is what is adding the product images to the email and subsequently breaking the layout in the email.
You will need to contact the theme author for the resolution to this email display issue..)))

I will attach links so you can view the screenshots.