Green tea shots are very pleasant to drink and if you are not careful, it is easy to drink more than you intended. The peach schnapps and the cranberry juice makes it very delicious and effectively masks the bitter taste of the whiskey.
You can check this article if you want to go deeper in it:- https://advancedmixology.com/blogs/art-of-mixology/green-tea-shot
There is no actual green tea in green tea shots. It was just named such because of the greenish color and the hype on green tea as a good drink to aid in weight loss. However, if you are not too careful, this shot gives more calories per shot than you would have loved.