Is end-to-end encryption available in Nextcloud 17?


I am newbie with Nextcloud and am discovering all features.
I have activated Server-side encryption in my Nextcloud server, but I did not find how to Enable recovery key (as indicated in the documentation).
The 2 fields to input a recovery key are not displayed in the admin page.

What about the end-to-end encryption with Nextcloud 17 ?
I figure out that the server side encryption do not correspond to the same notion.

Best Regards,