Precision : As far as I tested, as you can see in the new picture in attachment, the block_display can display other block entities without any issue (Examples : chest, dispenser, flower pot, etc.). But the patchnote says that the block_display can't display block entities (https://www.minecraft.net/en-us/article/minecraft-snapshot-23w06a). So there are 2 possibilities :
either there is a mistake in the patchnote, and all the block entities should be displayed
or there is no mistake, and all the block entities should not be displayed
In any case, this isn't normal that some block entities can be displayed and others can't.
Xerdot
Response to @Dhranios
Precision : As far as I tested, as you can see in the new picture in attachment, the block_display can display other block entities without any issue (Examples : chest, dispenser, flower pot, etc.). But the patchnote says that the block_display can't display block entities (https://www.minecraft.net/en-us/article/minecraft-snapshot-23w06a). So there are 2 possibilities :
either there is a mistake in the patchnote, and all the block entities should be displayed
or there is no mistake, and all the block entities should not be displayed
In any case, this isn't normal that some block entities can be displayed and others can't.