Yes, you can absolutely access your ps4 camera remotely.
If you’re away from home and you want to use your ps4 camera to keep an eye on your pets, for example, you can do so with the ‘ps4 remote play’ app for PC.
Once you’re in the app, simply go to the ‘settings’ tab, and then click ‘devices,’ ‘ps4 camera’, and you’re good to go.