As far as I understood it, everything you got back by now is all you’ll get. Because they only managed to recover all the titles you saved with tags or in lists. But not those just saved as „reading“ or „finished“. I know it sucks… I lost over 1.5k in total. But yeah I learned from it and now put tags for every single one lol. Also I fortunately had some in lists so they are still saved there, I just gotta change the status again from want to read to read.
Luckily I managed to manually find most of the manga I was actively reading. A large part of my list hadn't updated in over half a year. Sometimes even well over a year. So those ones were probably canceled/abandoned anyway.
All info here
https://www.mangago.me/home/mangatopic/21255174/
Because it's been a few weeks now, and I used to have like 250 saved manga. But right now I still only have <100.