I know of novelupdates but their information is a hit or miss. For the more mainstream series they are accurate, but everything a bit more off the beaten path is a gamble.

Have you thought about keeping notes about what you’ve read? It helps me to remember what happened so far even without ADHD. When I pick up a series again I look up what I’ve posted about the previous volume in my “mini review” here in the weekly thread.

https://j-novel.club/series?status=complete

Technically this works

https://www.novelupdates.com/series/there-was-no-secret-organization-to-fight-with-the-worlds-darkness-so-i-made-one-in-exasperation/

This one is completed as a WN by original translator, and in my opinion it is good