I have recently noticed that on the WaniKani app there is an option to show all readings for a kanji. I can’t believe it took me 14 levels to realize that. That is sooo useful, when you want to have a fast access to all readings of a kanji.
That being said, I realized that it isn’t made clear which one(s) is on’yomi and kun’yomi. So, if you forget which ones are which or you have yet to learn some of them, you can’t know. Am I missing something? Would it be possible to just separate the on’yomi and kun’yomi readings from each other with a slash or something else?