Technically, voyaging Belarus should be secure as conflict is between Ukraine and Russia. Also, as Russia has invaded war on Ukraine, and Russia and Belarus are allies, there should be no big threat to Belarus and its borders. Belarus and Ukraine share a border of more than 1000 km.
Countries supporting Russia in war? The past few years did not go good for the world and things are still not good. In 2020, Covid 19 made our life miserable and now the war between Russia and Ukraine. Both the countries were once allies and shared a strong relationship with each other.