iOS 26.3 (23D5114d) seems to fix that https://www.corbado.com/blog/isuvpaa-ios-26-getclientcapabilities

No that is not possible.

Are you sure you mean 17.7 Beta 3 and not 17.6 Beta 3. transports are fixed authenticatorAttachment is still buggy not correctly set to cross-platform it remains platform which is a huge problem Tested on : iOS 17.3 Beta 3.