If you can't access your camera on Apple devices, this is likely to be a builtin Security & permissions issue, to fix this the Guides are below:-

Apple Mac (all O/S)

https://support.apple.com/en-gb/guide/mac-help/mchlf6d108da/mac

Iphone

https://support.apple.com/en-gb/guide/ipad/ipad402420f4/iphoneos

Ipad

https://support.apple.com/en-gb/guide/ipad/ipad402420f4/ipados