Hi Aaron , thank you for submitting to our Feature Requests!
Can you please specify which loading screen you're referring to so that we can suggest the most proper workaround?
There is a possibility of uploading your own files to the Media App located on your Dashboard. You can upload custom icons in GIF, PNG, JPG formats, as well as add media through our Unsplash Free Stock and Canva integrations.
However, we need more information on how you want to bring that together with the eCommerce system.