At what level have you seen every kanji in Wanikani?

It does teach you a lot of vocab but like Kazzeon mentioned, you’ll be missing a lot of words that are kana only. I highly recommend Torii for vocabulary. There’s both an app as well as a PC version that you can sync up. It’s free, too!

It works in a similar way as WaniKani does: Learn lessons, and then review them until you master them. It’ll teach you the core 10,000 vocabulary words you’ll need to get to fluency, and you have the option to organize the lessons by JLPT level.