In 1.16.4 v0.3 there are some blocks missing (atleast for me). Like extractor and similar items. I don't know if it's happening just for me or the others too. If I place those items in 1.14.4 v0.2.3 and reload the world in 1.16.4 the items dissapear. If It's a bug I look forward to it being fixed. It removes a lot of useful features. :/