SQLite do actually support savepoints

[romuald]

Simply remove it from the unavailable list (that is now empty)

Tested on a local instance and it seems to work out of the box

[jvanasco]

IIRC, there has been some amount of SAVEPOINT support since 2009 but it had been pretty buggy and limited for quite some time. I believe the more recent versions can handle it well.

SqlAlchemy currently states (sqlite version):
:

Supported version | 3.12+
Best effort | 3.7.16+

There are outstanding issues about how savepoints work due to the pysqlite driver; a warning like this has been in SqlAlchemy for many years (and still is):

SQLite’s transactional scope is impacted by unresolved issues in the pysqlite driver, which defers BEGIN statements to a greater degree than is often feasible. See the section Serializable isolation / Savepoints / Transactional DDL or Serializable isolation / Savepoints / Transactional DDL (asyncio version) for techniques to work around this behavior

Theoretically it works, in practice it is often more complex - and utilizing it requires deploying workarounds.