Were the twelve apostles of Jesus baptized?

We don't know. However, it was very likely that many of them were originally disciples of John the Baptist (e.g. Philip, Nathaniel) and so, as a result, may well have been baptised.

But there are no records of baptism among the disciples.

I don't think they have gotten baptized physically but spiritually they already have been baptized for Jesus baptized with fire and whoever believes in Him is granted eternal life.