Can this be displayed as a picture. I can upload them, but cannot display them. ImageMagick will process them.

It's not a standard web image format"and still not supported by any browser yet: https://caniuse.com/?search=heic

It would be waste to cover it. Even if Imagick may process it - which depends on its configuration - what benefit does it provide if no one can see it? It would have to be converted to a webformat like jpeg on resizing so you can just use that in the first place already.

You can add "basic" support for the files itself using the anyfile plugin already but it will not behave like an "image":

All Apple phones use HEIC /heif now for years. I am surprised that so many applications do not support it.

It is simply not a web format as explained. Nothing we can do here anyway if it cannot be processed server side. Same as with webm/p by Google.