Tears Of Gratitude, Painful Smile
This is an emoji that combines sadness and happiness. Tears represent sadness, but a smiling mouth represents happiness. It can be used to express a variety of complex emotions, including gratitude, tenderness, happiness, and looking happy when actually sad (painful smile). It can also be a response to ups and downs.
This is an emoji launched in 2020. If it does not display, it may be because your device version is too low.