While no one should approve of sharia law - draconian and medieval - ABS figures from the 2016 Census disclosed that of couple in Australia, only 0.9 per cent - fewer than 1 in 100 - were 'same sex.'
Another figure I read was that a tiny 1.6 per cent of Australian males said they were homosexual. Even if it was double that, it's still a very small percentage. The figure for women may be far lower.
From reading Nine Group major print media, sometimes one might think 50 per cent of Australians were not heterosexual. Not true, so while we should all disapprove of many of Brunei (and the Middle East's) stated intentions or practices, the scope of which is beyond a forum on transport, BI will hardly be shaking in their boots unless the wider community disapproves to such an extent that they won't fly with it even if it offers cheap or good value fares.
BI also doesn't offer beer or wine (although allegedly one can take those tiny bottles of spirits on board and ask for an accompanying Coke, tonic water and so on with no objection from cabin crew. As I like one beer with a main meal, this is another unsatisfactory feature. Plus I enjoy pork.