Initially scheduled to release around the same time as the Galaxy Fold in May, the Mate X had to be rescheduled for a later date as Huawei started to face severe problems with the U.S. bans. Even though September was supposed to be the new target for the relaunch, Huawei recently announced that the Mate X will most likely be released this November.
https://www.notebookcheck.net/Huawei-Mate-X-foldable-launch-pushed-to-November-successor-model-may-get-more-screens.430348.0.html