akonadi-backend-sqlite 4:23.08.0-0ubuntu1 (s390x binary) in ubuntu mantic

 Akonadi is an extensible cross-desktop Personal Information Management (PIM)
 storage service. It provides a common framework for applications to store and
 access mail, calendars, addressbooks, and other PIM data.
 .
 This package installs everything what's needed for Akonadi to work with SQLite
 as underlying data storage engine. Since SQLite is an embedded database
 engine, a separate SQL server daemon is not necessary.