I believe the original novel leaves it up to interpretation, so that is likely what I’ll be doing as well. Unless you have a reason for why it should be explicitly addressed? I’m willing to hear such an argument, because I don’t really care either way.
I always though it would be a better way to justify both Lando’s presence and everything that was set up with Jannah, had it been included in the final film. But on the flip side, all the talk to strengthen Jannah’s (and by extension Finn’s) arc would necessarily take us to the prospect of a stormtrooper revolution or mass defection, which could be difficult to write down without it feeling like a what-if fanfic.
Maybe it would be better to leave it as it is, instead of giving Jannah more weight in the story.