I know at least for French it’s been more controversial as there was no direct they/them equivalent. Instead new language has started to be used, though it’s not standard. I find it interesting as they/them is often defended (beyond the fact that it’s been in use in English for a long long time) as being a language tool in English that’s readily available and a far more palatable alternative to neo-pronouns. However in French (and other languages) I wonder if an invented gender neutral equivalent is culturally perceived as being no different.