Is it permissible to drink "Kombucha" tea, which contains an alcohol content of 0.65% as a result of the fermentation process?

There is no harm in drinking the aforementioned tea if the alcohol content in it is very low and does not lead to intoxication. As long as the impurity (alcohol) has been consumed and has disappeared into the tea, with no trace of it remaining, then it is not considered an intoxicant and does not fall under the ruling of forbidden things.