@DavidCarlisle Reading tex.stackexchange.com/q/667165/52406. Is it so that in tikz-cd, the label is from the beginning set in scriptsize, and therefore the c and the 1 there are both in scriptscript size?
@DavidCarlisle I see new answers as well. But isn't this in the end another example where one could question the situation with design sizes? As is, the f in the tikz-cd example is taken from a different design size, isn't it?