It's possible to copy and paste animated GIF to macOS notes app. And it stores them as animated GIFs as they can be previewed with the animation. However, when you copy one from notes it just copies the image in different format which is not animated. How can I copy animated GIF from macOS notes and paste it to another app?
Update: When I try to paste it into Mail app and then send it, it just sends as plain image (not animated one). If I google the gif in a browser and press Copy Image and then paste it into the Mail app everything works fine.