Let’s climb Tokyo Skytree - level 60 in autumn 2023

It’s not a built in feature, more so one of the popular user scripts: [Userscript] WaniKani Lesson Filter

If you’ve not done so yet, I’d recommend reading the Scripts section of jprspereira’s guide, it helped me a lot when it came to considering what scripts could help me with my progress. There’s an awful lot of very useful things people have made, this bit in particular is helpful: