Is this with IPv6 or IPv4?
After updating Sailfish OS to 5.0.0.55 Wireguard is now working for me via IPv6.
I had to edit my config file. As exported from the Fritz Box, it had comma separated entries for IPv4 and IPv6 and multiple DNS entries. As in the local network I’m using IPv4 addresses only, that’s fine for me.
With today’s update to 5.0.0.61 the config file could be imported, with multiple IP addresses.
It’s probably related to this PR linked from the February 20th Community News: Cycle WireGuard Address and AllowedIPs via list. by LaakkonenJussi · Pull Request #16 · sailfishos/nemo-qml-plugin-connectivity · GitHub
I did not check whether this is now supported out of the box or via any plugin that I did install before.
P.S.: As of now, Wireguard support needs to be installed manually.
See [Release notes] Tampella 5.0.0.55 - #25 by jlaakkonen