Provide a Sophos AV scanning engine with API access for Nextcloud Linux servers like Kaspersky did.

Kaspersky partner up with Nextcloud and provide a Kaspersky Scan Engine which communicates with an app via an API and scans every uploaded file.
https://nextcloud.com/blog/nextcloud-and-kaspersky-partner-up-to-protect-users-from-malicious-files/
https://www.kaspersky.com/about/press-releases/2020_kaspersky-and-nextcloud-partner-to-add-protection-to-content-collaboration-technology