I’m currently going through the Japanese From Zero course, the first book is online.
It would obviously be cool if it could get the same treatment as Genki where you could select it as the progression option, but obviously you can’t have that for every Japanese course out there, especially when you are still working on adding grammar.
Anyway, I also noticed that 誰 and なん/なに aren’t in the lessons. Would definitely make solid additions.
I’m currently on lesson 3, but I scanned the rest of the chapters and these are the main things it covers that don’t appear to be on Bunpro:
Using の with nouns to create adjectives
Using の with an adjective to create a pronoun (e.g. 美味しいの the delicious one)
きらい/だいきらい (I wasn’t sure if these would be something you’d cover but you have ほしい, which is similar in my mind)
ほしくない (Don’t know if you cover this under a different rule)
ご (語) These last ones you might consider more vocab than grammar though.
Anyway Japanese from Zero is a pretty popular resource, so I figured you might be interested in seeing what it covers. I didn’t do a particularly thorough search in Bunpro, so you may already cover some of these.
Cheers! ^ _ ^