It's the timestamps you marked shit read, not the account age.
please be patient and just stay calm and wait, lists are coming back from oldest accounts to newest, it will be at least another day or 2 for everyone's lists to be back completely. im from 2020 too and some of my stuff has started to come back so just give it time
i made my account in 2020 too and it's slowly coming back up. last night it was only two in my already read list but today morning it became 9. so trust it's coming back but realllyyyy slow.
I wonder when they will fix my list if I made my account in 2020 because my stories aren’t showing up （/TДT)/