I don't work for them, no. But as a British person I feel I ought to apologise on behalf of this British institution.
I don't see why this isn't available in non-UK countries, unless it's something silly and bureaucratic to do with the copyright or the broadcasting right of the actual production, or something else I know nothing of. It can't be anything to do with TV licenses because you don't need a TV license to watch stuff on iPlayer. I'd have thought they'd have embraced the opportunity to broaden their viewer base. After all, it is possible to listen to radio stations online from another country, and the BBC World Service is specifically designed for this. Ah well.