Font not marked as monospaced in iOS

[Kamik423]

I created a font with Ligaturizer (Liga SF Mono). In Font Book on Mac it shows up as monospaced, but on iOS it is lacking the traitMonoSpace, hence why it does not show up in any third party app. I installed the regular SF Mono, and it has this trait.

Is there any way to set a flag to mark the font as monospaced?

[ToxicFrog]

I have no idea! It doesn't seem to be part of the SFNT table. Hopefully it's not some Apple-specific OTF/TTF extension that Fontforge doesn't understand.