Depreciation of REST API function from 18 to 19?

KeyCloak Admin REST API in 18 Keycloak Admin REST API shows:
Trigger sync of users Action can be “triggerFullSync” or “triggerChangedUsersSync”
POST /{realm}/user-storage/{id}/sync

But 19 Admin REST API, does not Keycloak Admin REST API.

Has the API been removed or missing from documentation?

A lot of the user storage SPI and API stuff is in flux with the addition of the “new store”. I am not aware of documentation on what will be preserved, only that any user storage SPI implementations that anyone is using will probably have to be redone.