Please see this thread from last year. There is a userscript you can install that replaces kanji “reading” with kanji on’yomi or kun’yomi respectively in Wanikani. Also, the unofficial Android app “WK for Wanikani” does the same.
Install third-party scripts and apps at your own risk, but as a user of both, I can say there is little risk and much to benefit. For me, it definitely helps knowing which ones are on’yomi and kun’yomi. I have space in my brain to hold that info for a lot of items and I feel it really helps me to remember things better, and will probably get you in step better with people in traditional Japanese language courses and native Japanese speakers. If they mention which reading they are talking about specifically for a kanji, you’ll be more easily able to know that info.