Is Hades the only place where the dead go???

Revelation 20:13 "And the sea gave up the dead who were in it, and death and Hades surrendered the dead who were in them; and they were judged and sentenced, every one according to their deeds."

So there are dead in the sea, death and Hades and I am not only referring to bodies in the sea, but souls as well...

When we then look at the punishment for these 3 in 20:14 it says: "Then death and Hades were thrown into the lake of fire. This is the second death, the lake of fire. "

If you then read 21:1 which is two verses later: "Then I saw a new heaven and a new earth; for the first heaven and the first earth had passed away, and there is no longer any sea."

So, the sea is also punished by it being no longer...😲

I thought all the dead only goes to death and Hades, but this looks like the sea is also a holding area of souls until the resurrection.

Am I missing something or reading into these verses?