Comparing this situation to similar past conflicts, support will most likely continue covertly
History has demonstrated to us, that when public approval is against the support of a conflict, support is publicly condemned by politicians, but continues covertly. This can be seen with the US' weapons supply to Latin America during the Carter administration of the late 70’s, or the support of Saddam Hussein in the Iran-Iraq War in the following decade.
The example of the Iraq-Iran war of the 1980’s is particularly relevant as Iraq’s main financial support during this conflict was from Saudi Arabia, receiving $30.9 billion throughout the 1980’s. Similarly as France was supporting Iraq with over a quarter of their total arms stockpile and the US subverting restrictions by covertly supplying “dual-use technology” to Iraq that was clearly used as weapons, comparisons to the Yemen conflict seem numerous. When you then consider the that Iran is presently accused of backing Houthi rebels in Yemen, it’s plain to see this present-day proxy war closely resembles the Middle Eastern wars of the 1980’s, just carried out in different regions.
The UN should be looking to reform the unfair dominance of the Permanent Five powerful nuclear states within its system, to challenge states that veto much needed international intervention, like the Russian veto that blocked a Security Counsel resolution in February 2018. The UN should endeavour to take a more direct approach, rather than publishing reports to raise awareness and effectively wash their hands of the situation.