I would think that it’s worth it to revisit the idea of having Luke saying “Lesson three” or “Final lesson” during the Ach-To conversation seeing as it’s more plausable now.
Luke: “Rey, some things are stronger than blood. Confronting fear is the destiny of a Jedi. Your destiny, and my final lesson. If you don’t face Palpatine, it will mean the end of the Jedi, and the war will be lost.”