All our Wej Duj heroes came back for episode 1! ...I hope Ma'ah's okay.
It's interesting how between Lower Decks and Prodigy (plus some brief mentions in other post-VOY shows) we have a decent picture of how the universe view now-Admiral Janeway. It's clear she's viewed with a sort of heroic reverence, Captain Freeman assumed that Janeway's logs would have a good answer for a Tuvix situation. Voyager's celebrity status has definitely inflated her image a little, really put's Dal's awkward first encounter with the real Janeway in perspective.
It feels very right that they didn't actually dive into the morality of killing Tuvix other than "that's messed up!" and making the Tuvix'd crew clearly in the wrong/not sapient before de-Tuvixing them. Lower Decks does earnest optimism about Starfleet well, but I don't think deep dives into moral situations are something for a goofy 22 minute show.