legaloli

My server is in 1.16, I can access it with a 1.16 launcher but when I went to the nether all the biomes were wastelands, I just thought I had an unlucky seed because the piglins were there and the new sounds were there as well but then I tried to use the new locate biome command and it didn't work, so I went into creative and tried to place a new block from 1.16 and it turned gray in my hotbar. What's happening here?