Unfortunately not, no.
That sounds like it is still a VPN client which is directing your outbound traffic according to how you have it configured.
You want to have a VPN server that routes inbound traffic to the relevant internal network device (hassio, NAS, printer etc) so that they can be used from outside the network.
The first step is to have a device on your network to run the VPN server software. That could be your router or it could be a computer or you can also install it on a Synology NAS if you have one.
Open VPN is free software that you can use as the server.
It doesn’t really lend itself to a summary outside of the first paragraph.
They bought a specific thing for the reasons stated in the first paragraph and if you need something to do that then read on otherwise don’t bother.