Sutton SignWriting fonts not rendering correctly on iPhone

tzamin404 wrote:

We need to update Apple font support because Sutton SignWriting don’t render correctly on my iPhone.

To ask Apple to do that, you need to use

Product Feedback - Apple

But you can also try adding such fonts yourself:

Install and manage fonts on iPhone - Apple Support

I use the app AnyFont to add various fonts not available from Apple.

tzamin404 wrote:

I already updated to IOS 26.3 but Sutton SignWriting still don't render correctly in my iPhone.

Yes, it is very unlikely that Apple would add any new fonts to iOS until version 27 comes out next September.

I added a Sutton font to my iPhone, at it will display in apps with a font menu like Pages and in Unicode Pad, shown below, but not on a webpage using a browser.

iOS 26.3 released today. You may want to consider updating and checking if the issue is resolved.