Nested Brussels not in the update queue?

Several months ago this city was correctly added, encompassing its 19 parts that make up Brussels. While the nested parts receive updates from OSM on the expected schedule, the parent does not seem to have been updated since the addition. No last update time is mentioned and the total street count has not changed. I’m also not seeeing some streets that are present in the children. Is this expected behaviour or did something go wrong?