Hi @ibahnasy
With new major releases, they usually do a staged roll-out, i.e. it can take several weeks until all users are offered the update via the integrated updater.
See also here: Nextcloud Hub 7: advanced search and global out-of-office features
Get Nextcloud Hub 7
[…]
Over the coming weeks we will make it available to our home users via updater using the usual staged roll-out. If you can’t wait you can switch to the beta channel temporarily. Don’t forget to switch back to stable after you updated to Hub 7!