So last time i made the same issue but apparently i didnt put everything. So i decided to create an other one with all the details the devs needed.
So like before, idk if its a bug or not.
So when i try to create a block/item/tool/ everything. Some options are blocked. IJn this case, I tried to make an ore, like every new user on this patform. and if i want it to only spawn in the desert, i can't; the "the restriction biomes thing is just off. You can see that because the "+" icon and the "x" icon are grey compared to the two "modifiers" on top witch have a green "+" and a red "x".
There are so many other options that don't work:/
Thank you
PS: Sorry if my gramar and all these kinda stuff are not that good. It's cause icome from Belgium and my first language is French
PS 2: Th situation i talked about above is about the photo i've put in.
Now I can help as you specified it is addon generator type.
From the 2020.3 release article:
Currently, not all features are possible due to limited modding API. Bedrock does not run on Java so standard modding is not possible but only features exposed by the Modding API.