question

Yes they will.

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 July 2021 are getting their reads back.
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/

some people are getting some stuff back. please remember it's a small team working on this site, not a large company. look at the post "please me read before posting! please and thank you" for a few ideas of what you can do while you wait