VPN on Cloud - IP camera

Hello,

Is it possible to have VPN for example on OceanCloud or AWS and make it work as local VPN?

I have 3 security cameras on 3 different lacations which doesn't have public IP adresses and one NAS server on different location too, client is somewhere else also. Is there a possible way to connect all of these to "LAN"?

It would be easy if the camera was on LAN with VPN but i have no idea how would this behave on cloud.

Thank you for answers.

EDIT : I added diagram, for better understanding, how I imagine it to work. https://imgur.com/a/tD6Nk