I created the diacritics following the tutorial. I have tildecomb, circumflexcomb, tilde and circumflex.
But, when I exported the font, none of these worked (neither their combinations â, ê, õ, etc…).
In Glyphs, when I pressed alt + shift + n to preview the tilde, it appeared as “space”. Same for the circumflex.
Anyway, I fixed this by creating the asciitilde and asciicircumflex. Is this a step It should be considered in advance, or am I doing something wrong?