Originally posted by Nerevar:

adding them later is just stupid now as that would force a restart for everyone. mighrt be able to add these with ashlands of course since that will force a restart of the world seeds anyway sadly.

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They added/made available the dvergr door, and it didn't force my seed/world to reset, so that statement is false. No idea why it would force a restart for everyone.

Since the block the OP is asking for already seem to have been put to use in dvergr buildings, as the door was, adding it should not ruin stuff players have already build.