If you link your HEIC / HEIF image from elsewhere or store them externally, these images won't work. There is no browser support for HEIC / HEIF images. However, Bubble partially supports users who want to store images in this file type through Imgix (Bubble's image processor) because it generates jpgs on the fly. As long as the images are stored in the file manager (using Bubble s3 storage) you should be able to access these images.