I guess sportsbooks does not have this kind of event because it's just a rarely event and they didn't earn too much with this. We know it's happens every year and only has a small event before the miss universe, so there's a chance they will not add this as one of the listed people can bet.
Sportsbooks don't allow events such as this one, because the risk for them is too high. You never know who has the higher chances to win the title, because nowadays the scoring is not based on beauty. There are close to 100 participants and if the sportsbooks allow bets on this event, then there is a very high chance that they will suffer considerable losses. There maybe a few which allow to place bets for Miss Universe, but even in such cases, the odds will be structured in such a way, that the winners will not get large returns.
Odds been set would be entirely be depending on some factors or some into those casual odd making made out by bookies on which they do always set out on what are the numbers which are supposed to be set up.
Of course they are a business so its understandable that they would really be that keen on giving out numbers since they do know that it would really affect out their overall revenue.Its true that they would always
come after to make money against bettors.If they do saw that Miss U. cant give out sufficient profit or something risky for them to offer then they would just simply skip out.
Come to mind that there are lots of various sports which are more worth to give out some betting lines.