Are there any programs that handles these fonts where they can be exported as PDF and imported into Xara?
There's always a workaround out there so bemoaning the lack in a particular tool should be balanced by thinking what another might achieve.

I remember Acorn computers came up with anti-aliasing that Xara, as Computer Concepts, exploited in a fashion way ahead of Apple and Windows PCs.
There are always going to be winners and losers in capability in the short term.

Acorn