Are there analogues of the devP2P library for organizing a software VPN?

Question

VPN

It is required to organize p2p interaction in the program between the server and multiple clients. There is a devP2P library that allows you to organize such interaction, but does not require the organization of vpn on the host.
Among the main features (which are also required):

1. Cross-platform (Linux, Windows, Raspberry Pi).
   
2. Organization of interaction (data transfer) p2p between nodes in a virtual network (routing, visibility, etc.).
   
3. Encryption support.
   
4. Openness (free).
   

Not required:
Traffic redirection for some specific services (like "remote desktop", etc.)
At the moment I have not seen similar solutions. Judging by the documentation, this library allows you to do something like:
server:

createVPN();
listen();

client:
connectToVPN(serverip);