My project “Sakai Plus” is adding an LTI Advantage “provider” to Sakai 23. Sakai already has an LTI 1.1 provider (i.e. you can launch a Sakai tool from another LMS like Canvas, Moodle, Blackboard, etc.). You can follow progress at:
https://github.com/sakaiproject/sakai/pull/10121
The Sakai Plus effort will build equivalent and expanded support for integrating Sakai into other LMS systems using LTI 1.3 / LTI Advantage.
Unlike most of Sakai (and Tsugi) – the Sakai Plus LTI 1.3 provider will be done completely separately from the LTI 1.1 support. In lots of other places, a lot of effort has been made to make code support LTI 1.1 and LTI 1.3 simultaneously in the same code base with careful use of if-then-else. But because the scope of LTI Advantage tool provider is quite a bit broader that the LTI 1.1 provider, it will be kept separate so it can grow without maintaining legacy capabilities.