20w45a Nether Trees not spawning

I know that the snapshot is still being tested and all that but when I went to the nether the red biome and blue biome didn't have anything growing in it except vines. I can understand why this hasn't been seen yet with all the spyglass and geodes and candles added but it was just weird. Mojang team keep taking your time with the updates and bring us the best thing to be announced in 2020