The 'sea' of Rev [21v1] is that there was no more sea of rebellious humanity left.
Rev [17v1] mentions many waters. Verse 15 explains the waters mean peoples.
Isaiah [57v20] says the wicked are like the troubled sea.
Before ancient Babylon was destroyed the water around it was dried up.
In the same way the water or people will be dried up, but dried up spiritually.
-Rev 16v12.
Rev [22vs1,2] says there will be water. 'Water of life' [literal and spiritual]
that water issues from the throne of God and of the Lamb Jesus.
That 'water' in verse two waters the trees described as curing or healing the nations.
That will complete the promise to Abraham [Gen 12v3; 22vs17,18] that all nations of the earth will be blessed. Yes, the tabernacle or dwelling of God will be with 'men' in the sense that mankind will be blessed through Christ Jesus as the crowned king of God's kingdom.