On the latest version on GDevelop Mobile for IOS devices, in the preview not all objects are shown.
It works on my IPad Pro 5th gen 12.9”
It does not work on:
iPad 9th gen
iPad 7th gen
iPhone XS
In one other game, my physics objects get blown up in scale. On the same test devices, except the iPad Pro.
In the web browser editor on these devices they just work fine.