Hi there rodents,
I might need your help here to find something which seems to be as rare as a diamond.

Let me explain:
today me and my friends decided we finally needed to setup a vpn to play lan games, expose services like synchronized film streaming etcetera.
As per my advice, since low latency and ease of use are a must, we settled on wireguard.

After the vpn was on, we realized some games could not be played due to them strictly using broadcast to do participants discovery/connection. A shame, but we’ll just play something else.

Then someone proposed we search a solution to ease the pain we have in sharing files.
Since half my friends have a slow internet connection, uploading to a server and then downloading back would require too much time, so we opted for direct transfer programs.

alternativeto.net proposed programs as lanXshare, dukto R6, nitroshare, all of which unfortunately make use of broadcast to find peers on the network.
As already discovered, broadcast doesn’t work in the vpn, so we have no idea what software we could use that doesn’t connect to the cloud, nor forces us to have a share service on the server which hosts the wireguard central node.

I would like to avoid using ssh or ftp on everyone pc as well, since the majority of them uses windows and only have basic computer skills.

Does anyone have a program or even a tip which could help?

Thanks in advance!