Unfortunately it'll be a time game while we wait for everyone's lists to be restored (there's thousands of us lol). That being said Ive heard many users are getting their manga returned to the 'read' list, regardless of it they're were in one of the others too. I've added some of my manga back into my lists since they broke and nothings caused an issue, but I do recommend trying to wait just in case there are any possible issues :)
https://www.mangago.me/home/mangatopic/21092806/
^^ for updates
dont worry!! they are also doing rated mangas first (although, I personally have gotten very few nonrated ones)
https://www.mangago.me/home/mangatopic/21080691/
for FAQ ^^
for updates vv
https://www.mangago.me/home/mangatopic/21092806/

I know that there is still a big issue with everything, but I’ve heard that some users from before 2020 have started getting their lists back, some if not all. I’m still waiting on all of mine, like literally everything. The only stuff I have in my list is that the stuff I’ve added back in.
Will I not get anything back due to me doing that? And if not, does anyone have a rough estimate of when I’ll be getting my reading lists back?