Hi Lee!
Yes, I really have lots of fonts in my font directory.
The fonts that didn't work are those included in the Affinity free kit, "iconic fonts".
Damion, Allan, Rokkitt, Candal, Amarante, Alfa_Slab_One... Every font in this kit. But I don't think the problem is the kit, because I then tried to install other fonts to verify, and it still doesn't incorporate any other fonts. AD only shows me the fonts I had in the old version, since the update to 1.7 it doesn't let me see new fonts anymore.
Rokkitt-Regular.ttf
PaytoneOne-Regular.ttf
AlfaSlabOne-Regular.ttf
Edit: same problem with AP