Spent some time referencing my Wing Chun history books. One helpful reference for Wing Chun Crane kicking techniques that don't happen to pop up in Wing Chun's short fist sets are the broader southern Tiger-Crane combo methods, since they share a lot of Crane and Dragon material with Wing Chun (and, the most critical modern proponents of both Tiger Crane and Wing Chun happened to both open up medical shops in Foshan...).
Basically, the kicks that are "missing" in Wing Chun aren't missing, they're just not transmitted through a lot of modern lineages. The 8 listed in the article above are probably a subset of a larger group practiced in the south. Basic kicks of all different types (or as I like the call them, the "gerk squad") should be part of any kung fu kicking drill list (I have a list like this somewhere with maybe 12 different kicks, which I think include all 8 listed in that old newspaper article based on the description).
The kick on the top left is the famous "Shadowless kick", the Mu Ying Gerk. the two below it are southern White Crane, actual kicks aren't shown, just the setup. The one on the bottom right is the source of the Okinawan Tang-Te Crane kick.
View attachment 28040
View attachment 28041