Manga won't bother with the catalog because most people would have gone for the US release (or even the Essentials version which is even cheaper). Pretty much they're focusing solely on the more popular titles, for instance, Goblin Slayer and Slime were among the big titles of the Autumn 2018 season. Zombieland Saga is the other big title from that season which I suspect Manga will likely release once Funi adds it to their schedule, and Fairy Tail Final Season may as well get brought over considering there are only around 4 parts left to wrap up the releases - granted we're missing Fairy Tail Zero for the UK (I reckon Funimation US will re-release Fairy Tail into massive collection sets like Madman's Guild Collection to make it quicker for newcomers to own the series i.e. 4-cour Blu-ray only sets).
With regards to Attack on Titan, Black Clover and My Hero Academia, I expect Manga to re-release those parts/season sets that were under Sony to be brought back to their label for consistency. We already knew since late June that My Hero Academia Season 2's extras had been rated under Manga so it's just a matter of when. Black Clover Part 1 I hope gets re-released for consistency reasons, while there's plenty of time for Attack on Titan Season 2 to return.