Feature request: "you may be confused with ..."

[acm2010]

You can try my userscript for similar kanji:

[Userscript] Niai 似合い Visually Similar Kanji

This is a third-party script/app and is not created by the WaniKani team. By using this, you understand that it can stop working at any time or be discontinued indefinitely. Niai Visually Similar Kanji by acm This is the stable release of my latest script, Niai Visually Similar Kanji! This is a completely new implementation, and a substitute for the old Wanikani Similar Kanji script, and a more full-featured version of Wanikani’s own Visually Similar Kanji section. Installation…

Currently it is not “curated”, it probably shows more kanji than necessary. But you can add and remove entries and it also shows up during lessons and reviews.