I'm looking for information on Unicode Bidirectional Algorithm (UBA) implementation on iOS.
I'm interesting in knowing what level of the UBA is implemented on iOS and whether, for instance, UBA 6.3 Directional isolate characters are supported.
The latest version of Safari (12.1.2) on Mojave does not seem to support properly parentheses in bidirectional text (mixing Latin scripts and RTL scripts). Admittedly, I don't know whether the Safari bidi rendering is purely done by Safari or it relies on some iOS rendering engine.
If this is an issue which would need to be asked in some other forum, could someone point me to that forum? Thank you.