Go to the genre section and select “webtoon” plus the genre you usually read (e.g “yaoi”), then choose “update date” and you’ll have the list of all manhwa recently updated - i’m sure if you look through it little by little you’ll eventually recover most of them (especially the manhwas that are still ongoing)
Just copypasted from my faq
・Go through your comments and on-site history
・Check your browser history. Keep in mind, most browsers only save up to ~3 months of history.
・Go through lists with tags you're interested in
( https://www.mangago.me/listtag/)
・Ask for some stuff in the questions section! Some people have some very good lists they'd like to share or remember titles you've forgotten.
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I managed to recover ~300 titles from my browser history alone but it genuinely took 300 years (2 straight hours but same thing lol)
if you're a mobile reader and have tabs open as well, check those. I probably have 500+ tabs open rn (half of it is probably the same shit tho)

I guess my list not going back anymore only 20% of my list r back. So sad i doesn't even remember what manhwa i usually wait for update