Where is the extraNonce in this coinbase transaction here?
Which part is the actual AntPool address


The miner's address is not part of the coinbase part of a coinbase transaction.


  and which part is the extra Nonce


There is no standard for putting extranonces in the coinbase transaction. It is really just arbitrary data. You cannot determine what is actually the extra nonce and what is just arbitrary data unless you know what the software that generated the coinbase transaction actually does.


  also why does it have decoded?


Typically miners will put some text in the coinbase part of the coinbase transaction. This text is encoded, and thus must be decoded in order to read it.