You will find the guest app unter "Collaboration"
And the activity app can be found under "tools"
The Trashbin (files_trashbin) and Versioning (files_versions) apps do does not work with e2ee files. Unencrypted files are still supported.
De-/Encryption times for small files (<20MB) are barely noticeable on modern systems or even mobile devices. The larger the file gets the more noticeable is the wait after downloading (or before upload starts) - always depending on your hardware.