The Portcullis is a Netherite door design. It is available in the 1.16.x and higher.
We designed the Portcullis to provide medieval, strong bars design. Like default doors, this door don’t block light. Maybe there is a tiny gap under the door?
|Catches fire from lava||No|
|Can opened by||Redstone|
|Can villager open||No|
You need to combine one iron bar with 1 netherite ingot and 1 Black Colored Wood into 1 Portcullis.
Independent of the block state, the door cannot be opened by villagers.
The Portcullis can only be placed on full solid blocks. Place those doors like you would place a default door in Minecraft.
More information to door placement: https://minecraft.fandom.com/wiki/Door#Placement
Opening and Redstone component
By default, the Portcullis can be opened by Redstone.
If the door is in the block state “Redstone only” or “both“, it can be opened by a Redstone signal. For example, by placing a Redstone block next to one of the door blocks and placing a Redstone torch beneath it.
The door can be opened by hand, if it is in the block state “hand only” or “both“. If a door is in the block state “nothing“, it cannot be opened. The settings can be changed with the ManyIdeas core item “Redstone key”.
More information to doors and Redstone: https://minecraft.fandom.com/wiki/Door#Redstone_component
Issues relating to the “Many Ideas Doors” can be reported here.