We should be careful to identify the right problem here - there are some standards that more or less everyone agrees should be kept. Someone has to moderate the platforms. But governments are the home of the most politically charged people in society. The moderators should be as distinct from the people who control the military as is humanly possible. It is a critical control of any free society that people can criticise the military freely, and the people who control the military as well. The risks of corruption in the military are off the charts high. Civilisation endingly high. Potential end of humanity high with the weapons we have today. Their flaws must be understood.

The people who control Twitter should be free to decide what standards they enforce. The problem with Twitter's censorship was that the standards were stupid and hypocritical, bound to make embarrassing mistakes (there were a lot through COVID) and alienate around 20-30% of the population of the earth. But if they want to sink their own platform that is acceptable.

But the problem with a special government portal is that it is corruption of genuinely important free speech principles. They shouldn't have a special portal. They should have multiple layers of indirection dampening their influence.