The 3D transforms should be placed in their own folder like what I did with my custom variants (Transform - 2D).
In order to do so, I simply named my transforms to have a forward slash “/” in its name to designate a folder.
This prevents overly lengthy dropdown menus for a key component like LocalTransform which exists on every entity and would most likely need custom variants.
Now I’ve only verified this works with the IMGUI dropdown selection window and I don’t know if it works in UIElement editor windows but from what I can tell in 2023.2 alpha, they haven’t changed single selection editor drop downs away from IMGUI yet. (This is as opposed to, for example, flag enum selection which is UIE.)