This site introduces unknown Emanuel Bach (C. P. E. Bach).
ChatGPT4o writes as follows (please note that it may not be accurate):
Emanuel Bachʼs "Les Langueurs tendres" (Wq. 117/30) is a delicate and sentimental character piece written in E-flat major. Reflecting the characteristics of the Empfindsamer Stil, its gentle and lyrical melody resonates with the heart. The leisurely tempo and ornamentation skillfully depict deep emotions. Although short, it is poetic, requiring the performer to exhibit nuanced expressiveness on the keyboard instrument. It was a beloved piece of salon music at the time.
For an overview of Wq. 117 as a whole, see Character Pieces Wq. 117 .