It’s not supported. But I think this could be useful.
One thing to keep in mind with logseq is that the UUIDs aren’t stable. So when the user reindexes, it gets auto generated. So you’ll have to add the property id:: 62fe5f42-9e5b-44e0-b732-10950eb02c8a to it whenever creating a block that requires stable uuids as is apparent in your case.