Just to say off the bat that I don’t think either of these are essential lessons for Bunpro as they are very common phrases and something that can probably be picked up without too much fuss…however…
If Bunpro is going to have a lesson for 気になる (which itself mentions 気にする) then perhaps it should have a lesson for 気にする for the sake of contrast? As it is in N2 it is probably a “free” grammar point for anyone who is at that stage anyway but it seems like if you have one then you’d want to teach the other at the same time or right next to each other. It is a ridiculously common phrase so could be worth adding (or perhaps not precisely because of how common it is). Although, again, it is surely “free” for anyone who is studying for N2 anyway.
Thoughts? Feelings?