For a rk3568 (B2 ?) firewall/router I saw this FriendlyELEC NanoPi R5S board also in linuxgizmos. But I guess it doesn't count (yet?), because I can't find availability or price.
Also, I don't know whether the RTL chip for 2nd/rd ethernet port needs blobs or not.
Also, I don't know whether the RTL chip for 2nd/rd ethernet port needs blobs or not.