These both works on iPhone.
service: notify.mobile_app_normanns_iphone_12
data:
title: test
message: test
data:
attachment:
content-type: jpeg
url: "https://homeassistant.mos-eisley.dk/local/tmp/front_door_cam_snapshot.jpg"
service: notify.mobile_app_normanns_iphone_12
data:
title: test
message: test
data:
image: "/local/tmp/front_door_cam_snapshot.jpg"
If You press and hold the small picture in the message, it will be enlarged.