The ACL has not been added to v6 yet. It will come back for sure, but I don't know where it is on Acyba's priority list.
Please keep in mind that v6 is still in development and Acyba has enabled us to use v6 during this development instead of keeping us waiting until it is finished.
Feel free to add ACL as a feature request on Acyba's website (https://www.acyba.com/community/feature-requests.html) so other users can upvote it. It might get it higher on the priority list.