We have a version Tom Clancys Rainbow Six Siege Operation Wind Bastion.
In a home network, four PC connections work. Not via Radmin VPN.
We don't see anyone in the game. No host.
THX
Ëdit: Now we have version OPERATION EMBER RISE - 13487097. Still no host.
(I found cool site: https://www.mr-gamer.net/r6s/ but no actual. )
Check if ports that the game you`re playing in is using on your local PC to etsablish connection are open.
And try this manual https://radmin-club.com/minecraft/lan-for-minecraft/