SONOS assigns very confusing names to their products. Your “Connect” has been replaced with “Port”. By the way, Connect and “Connect:Amp” manufactured after January 2015 are compatible with S2. The first four characters in the device serial number give the date of manufacture. “Amp” is the current replacement product for Connect:Amp. The word “Amp” is often used to refer to a generic 3rd party “Power Amplifier”. It’s confusing.
Here is the compatibility list. At the bottom of this page is instruction for accessing your SONOS account. Usually there is an indication here about S1/S2 compatibility of your players.
I’m not sure which product you are referring to with “dock”. If you mean “BRIDGE” this is not S2 compatible. “Boost” is the replacement S2 compatible product. Also note that, if you are able to wire a player to your network, BRIDGE/Boost is usually redundant.