They aren't deleted you'll get them back.
don't worry, ppl whose acc were made in 2014 and 2015, as in earlier years, slowly got their reads back.
Currently users who added stuff before February 2022 are getting their reads back. It wont all come back instantly but slowly one by one.
Here's proof of accs who've gotten their lists back :
https://www.mangago.me/home/people/65330/home/
https://www.mangago.me/home/people/7934/home/
https://www.mangago.me/home/people/12004/home/
so yeahh it'll take quite some time but you'll get them back.
also once they're back, in case you're looking for ways to save them perhaps in an excel file, I've made a tutorial on how to do it easily and quickly rather than having to enter everything manually one by one, so if you'd like, you can check it out.
https://docs.google.com/document/d/14Drj0CviUhrAmZlU-DC-AtxGFQoH1_PYQ81b2Vzu82w/edit?tab=t.0
also check out this faq
https://www.mangago.me/home/mangatopic/21080691/
and this to keep up with the time stamp
https://www.mangago.me/home/mangatopic/21092806/

When will my 'Want to read' 'Reading' and 'Already read' come back, I'm not complaining, just paranoid, scared that I'm going to lost hundreds of manga. With the oldest manga site got deleted that makes my anxiety even worst. I added some 'want to read' manga and when I do, the thought of it overwriting the previous save mangas make me fear the worst