Generally speaking, the Synology 220+ supports WOL (wake on Lan), so it can be powered remotely from the local network or from the Internet, in which case (if you are powering the device from a remote location outside your local network) the router must also support WOL and after a little configuration this can be set up.If you are powering the device from a remote location outside of your local network) the router must also support WOL and after a little configuration, this feature can be implemented. There are several sites and YT clips available on this topic, so I guess you can look for the most appropriate scenario for your needs.

Synology NAS devices can usually be remotely booted via WOL (Wake on LAN).

https://kb.synology.com/fr-fr...
https://kb.synology.com/fr-fr...
https://kb.synology.com/fr-fr...