Wikipedia has this map documenting international reactions.
I always find these maps interesting. When the US acts alone, support always comes from Israel and at least some of the CFA states (tiny island nations in the Pacific, most commonly Palau), and sometimes from right-wing governments in Europe and the English speaking world (under W, it was usually the Czech Republic and Canada).
When Russia acts alone, its support usually comes from Venezuela, Cuba, and Nicaragua (three anti-American left-wing autocracies in Latin America), sometimes from Ecuador and Bolivia (two anti-American left-wing democracies in Latin America), and sometimes from Belarus (whose dictator is dependent on Putin and has come to increasingly resent it and fear Russian annexation), and sometimes from a few tiny island nations Russia bribed.
When Turkey acts alone, well, the map I linked above is telling, but
actually a little bit misleading. None of the Central Asian countries have explicitly supported Turkey, but a meeting of the Turkic Council passed a resolution saying "yeah, all of us are totally behind Erdogan." Kazakhstan, Kyrgyzstan, and Uzbekistan are members of the Turkic Council, while Turkmenistan is an observer. I find it more telling that none of these states have actually
individually expressed support for Turkey. They seem to basically have gone along with him when it was socially awkward not to, but aren't terribly fond of the project.
Meanwhile, Hungary, the most autocratic member of the EU, has vetoed EU-wide sanctions on Turkey and expressed support for Turkey, but also paid lip service to EU condemnations; I think coding Hungary as pro-Turkey would be more accurate than coding it as neutral. On the other hand, Hungary's behavior here seems to be motivated more by a desire to annoy the EU than a desire to support Gollum.
Three countries have unequivocally supported Turkey: Azerbaijan, Qatar, and Pakistan. Azerbaijan and Turkey have a weird, incestuous, codependent relationship. It's sort of like the US and Canada, only more so, because they're both united by their passionate hatred of the Armenians. Qatar's foreign policy has always been idiosyncratic and has become more so since
friendship ended with Saudi Arabia, Iran is Qatar's new best friend. Turkey supported Qatar in that, and Qatar may be repaying the favor. Pakistan,
at least based on what I read on Reddit, likes Gollum far more than any other country, including Turkey, apparently because Pakistanis have become convinced he's going to reestablish the caliphate.
Also notably, the president of the Turkish Republic of Northern Cyprus expressed opposition to the Turkish operation. He was roundly criticized by a lot of other politicians, but a lot of the statements are along the line of "we have the obligation to support Turkey no matter what." So it's not clear to me to what degree this is genuine support for Turkey, and to what degree it's opposition politicians saying "Dude, Turkey is the only country that acknowledges our independence and the only country that doesn't take part in
the UN embargo against us! Don't make the volatile dictator who runs Turkey angry!"