I know a number of (big) countries like China and India are "fence sitting" by neither condemning the attack nor endorsing. But besides Belarus, which I'm pretty sure endorsed with words too (besides their military cooperation), which countries have voiced diplomatic support for Putin's invasion of Ukraine (or "denazification" thereof if you want to use the Russian government's terms)?
N.B.: it was somewhat easier to find which countries have recognized the Donetsk and Luhansk People's Republics: Belarus, Syria, Venezuela, Kyrgyzstan, Nicaragua, Sudan, and the Central African Republic. I'm guessing the countries which unreservedly support the invasion of Ukraine is a subset of these.
Also there's a video of Lukashenko giving a briefing over a map of Ukraine in which he is claiming (in somewhat rambling fashion--at least in translation) that Ukraine was planning to attack Belarus. (The video is intersting also because it gives some insight into the workings of the Lukashenko government. There's an army guy [probably a general], who instead of briefing Lukashenko on the military situation, simply stands at attention as Lukashenko "splains" to him the military "reality" as Lukashenko says it is.)